diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a990d61..fe2f2f66 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,21 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+This release contains **BREAKING CHANGES**. See the [v4.0 Upgrade Guide][breaking4] for required
+changes you need to make.
+
+[breaking4]: https://recyclarr.dev/wiki/upgrade-guide/v4.0
+
+### Changed
+
+- **BREAKING**: Sonarr `quality_definition` configuration updated to address unexpected changes in
+  Sonarr v4 that caused it to stop working. See upgrade guide for details.
+- Default for `preferred_ratio` changed from `1.0` to using the values from the guide.
+
+### Removed
+
+- **BREAKING**: Sonarr's `hybrid` quality definition removed.
+
 ### Fixed
 
 - Do not warn about empty configuration YAML files when they aren't really empty.
diff --git a/schemas/config-schema.json b/schemas/config-schema.json
index 09915dd1..b8d889ce 100644
--- a/schemas/config-schema.json
+++ b/schemas/config-schema.json
@@ -104,6 +104,22 @@
         }
       }
     },
+    "quality_definition": {
+      "type": "object",
+      "additionalProperties": false,
+      "required": ["type"],
+      "properties": {
+        "type": {
+          "type": "string"
+        },
+        "preferred_ratio": {
+          "type": "number",
+          "default": 1.0,
+          "minimum": 0.0,
+          "maximum": 1.0
+        }
+      }
+    },
     "radarr_instance": {
       "type": "object",
       "additionalProperties": false,
@@ -123,20 +139,7 @@
           "description": "The API key from Radarr."
         },
         "quality_definition": {
-          "type": "object",
-          "additionalProperties": false,
-          "required": ["type"],
-          "properties": {
-            "type": {
-              "type": "string"
-            },
-            "preferred_ratio": {
-              "type": "number",
-              "default": 1.0,
-              "minimum": 0.0,
-              "maximum": 1.0
-            }
-          }
+          "$ref": "#/$defs/quality_definition"
         },
         "delete_old_custom_formats": {
           "$ref": "#/$defs/delete_old_custom_formats"
@@ -165,7 +168,7 @@
           "description": "The API key from Sonarr."
         },
         "quality_definition": {
-          "type": "string"
+          "$ref": "#/$defs/quality_definition"
         },
         "delete_old_custom_formats": {
           "$ref": "#/$defs/delete_old_custom_formats"
diff --git a/src/Recyclarr/Command/RadarrCommand.cs b/src/Recyclarr/Command/RadarrCommand.cs
index 1302220c..0aa72475 100644
--- a/src/Recyclarr/Command/RadarrCommand.cs
+++ b/src/Recyclarr/Command/RadarrCommand.cs
@@ -7,9 +7,9 @@ using Serilog;
 using TrashLib.Config.Services;
 using TrashLib.Http;
 using TrashLib.Services.CustomFormat;
+using TrashLib.Services.QualitySize;
 using TrashLib.Services.Radarr;
 using TrashLib.Services.Radarr.Config;
-using TrashLib.Services.Radarr.QualityDefinition;
 
 namespace Recyclarr.Command;
 
@@ -73,8 +73,8 @@ internal class RadarrCommand : ServiceCommand
 
             if (config.QualityDefinition != null)
             {
-                var updater = scope.Resolve<IRadarrQualityDefinitionUpdater>();
-                await updater.Process(Preview, config);
+                var updater = scope.Resolve<IQualitySizeUpdater>();
+                await updater.Process(Preview, config.QualityDefinition, guideService);
             }
 
             if (config.CustomFormats.Count > 0)
diff --git a/src/Recyclarr/Command/SonarrCommand.cs b/src/Recyclarr/Command/SonarrCommand.cs
index 17f65fcd..a0447254 100644
--- a/src/Recyclarr/Command/SonarrCommand.cs
+++ b/src/Recyclarr/Command/SonarrCommand.cs
@@ -7,9 +7,9 @@ using Serilog;
 using TrashLib.Config.Services;
 using TrashLib.Http;
 using TrashLib.Services.CustomFormat;
+using TrashLib.Services.QualitySize;
 using TrashLib.Services.Sonarr;
 using TrashLib.Services.Sonarr.Config;
-using TrashLib.Services.Sonarr.QualityDefinition;
 using TrashLib.Services.Sonarr.ReleaseProfile;
 using TrashLib.Services.Sonarr.ReleaseProfile.Guide;
 
@@ -108,10 +108,10 @@ public class SonarrCommand : ServiceCommand
                 await updater.Process(Preview, config);
             }
 
-            if (!string.IsNullOrEmpty(config.QualityDefinition))
+            if (config.QualityDefinition != null)
             {
-                var updater = scope.Resolve<ISonarrQualityDefinitionUpdater>();
-                await updater.Process(Preview, config);
+                var updater = scope.Resolve<IQualitySizeUpdater>();
+                await updater.Process(Preview, config.QualityDefinition, guideService);
             }
 
             if (config.CustomFormats.Count > 0)
diff --git a/src/Recyclarr/Config/ConfigurationLoader.cs b/src/Recyclarr/Config/ConfigurationLoader.cs
index 2b5ce8c2..dfef2096 100644
--- a/src/Recyclarr/Config/ConfigurationLoader.cs
+++ b/src/Recyclarr/Config/ConfigurationLoader.cs
@@ -58,7 +58,8 @@ public class ConfigurationLoader<T> : IConfigurationLoader<T>
             switch (e.InnerException)
             {
                 case InvalidCastException:
-                    _log.Error("Incompatible value assigned/used at line {Line}", line);
+                    _log.Error("Incompatible value assigned/used at line {Line}: {Msg}", line,
+                        e.InnerException.Message);
                     break;
 
                 default:
diff --git a/src/Recyclarr/config-template.yml b/src/Recyclarr/config-template.yml
index f65b35ad..21990ef1 100644
--- a/src/Recyclarr/config-template.yml
+++ b/src/Recyclarr/config-template.yml
@@ -16,15 +16,18 @@
 
 # Configuration specific to Sonarr
 sonarr:
-  # Set the URL/API Key to your actual instance
-  - base_url: http://localhost:8989
-    api_key: f7e74ba6c80046e39e076a27af5a8444
+  series:
+    # Set the URL/API Key to your actual instance
+    base_url: http://localhost:8989
+    api_key: YOUR_KEY_HERE
 
-    # Quality definitions from the guide to sync to Sonarr. Choice: anime, series, hybrid
-    quality_definition: hybrid
+    # Quality definitions from the guide to sync to Sonarr. Choices: series, anime
+    quality_definition:
+      type: series
 
-    # Release profiles from the guide to sync to Sonarr.
-    # You can optionally add tags and make negative scores strictly ignored
+    # Release profiles from the guide to sync to Sonarr v3 (Sonarr v4 does not use this!)
+    # Use `recyclarr sonarr --list-release-profiles` for values you can put here.
+    # https://trash-guides.info/Sonarr/Sonarr-Release-Profile-RegEx/
     release_profiles:
       # Series
       - trash_ids:
@@ -38,9 +41,10 @@ sonarr:
 
 # Configuration specific to Radarr.
 radarr:
-  # Set the URL/API Key to your actual instance
-  - base_url: http://localhost:7878
-    api_key: bf99da49d0b0488ea34e4464aa63a0e5
+  movies:
+    # Set the URL/API Key to your actual instance
+    base_url: http://localhost:7878
+    api_key: YOUR_KEY_HERE
 
     # Which quality definition in the guide to sync to Radarr. Only choice right now is 'movie'
     quality_definition:
@@ -51,7 +55,9 @@ radarr:
     delete_old_custom_formats: false
 
     custom_formats:
-      # A list of custom formats to sync to Radarr. Must match the "trash_id" in the guide JSON.
+      # A list of custom formats to sync to Radarr.
+      # Use `recyclarr radarr --list-custom-formats` for values you can put here.
+      # https://trash-guides.info/Radarr/Radarr-collection-of-custom-formats/
       - trash_ids:
           - ed38b889b31be83fda192888e2286d83 # BR-DISK
           - 90cedc1fea7ea5d11298bebd3d1d3223 # EVO (no WEBDL)
diff --git a/src/TrashLib.Tests/GlobalTestSetup.cs b/src/TrashLib.Tests/GlobalTestSetup.cs
index 1bf5a195..56e86031 100644
--- a/src/TrashLib.Tests/GlobalTestSetup.cs
+++ b/src/TrashLib.Tests/GlobalTestSetup.cs
@@ -2,6 +2,8 @@ using System.Diagnostics.CodeAnalysis;
 using FluentAssertions;
 using NUnit.Framework;
 
+namespace TrashLib.Tests;
+
 [SetUpFixture]
 [SuppressMessage("ReSharper", "CheckNamespace")]
 public class GlobalTestSetup
diff --git a/src/TrashLib.Tests/Radarr/QualityDefinition/RadarrQualityDataTest.cs b/src/TrashLib.Tests/QualityDefinition/QualitySizeDataTest.cs
similarity index 58%
rename from src/TrashLib.Tests/Radarr/QualityDefinition/RadarrQualityDataTest.cs
rename to src/TrashLib.Tests/QualityDefinition/QualitySizeDataTest.cs
index 0989ed29..e6f4b698 100644
--- a/src/TrashLib.Tests/Radarr/QualityDefinition/RadarrQualityDataTest.cs
+++ b/src/TrashLib.Tests/QualityDefinition/QualitySizeDataTest.cs
@@ -1,12 +1,12 @@
 using FluentAssertions;
 using NUnit.Framework;
-using TrashLib.Services.Radarr.QualityDefinition;
+using TrashLib.Services.QualitySize;
 
-namespace TrashLib.Tests.Radarr.QualityDefinition;
+namespace TrashLib.Tests.QualityDefinition;
 
 [TestFixture]
 [Parallelizable(ParallelScope.All)]
-public class RadarrQualityDataTest
+public class QualitySizeDataTest
 {
     private static readonly object[] PreferredTestValues =
     {
@@ -14,17 +14,17 @@ public class RadarrQualityDataTest
         new object?[] {100m, 101m, true},
         new object?[] {100m, 98m, true},
         new object?[] {100m, null, true},
-        new object?[] {RadarrQualityItem.PreferredUnlimitedThreshold, null, false},
-        new object?[] {RadarrQualityItem.PreferredUnlimitedThreshold - 1, null, true},
+        new object?[] {QualitySizeItem.PreferredUnlimitedThreshold, null, false},
+        new object?[] {QualitySizeItem.PreferredUnlimitedThreshold - 1, null, true},
         new object?[]
-            {RadarrQualityItem.PreferredUnlimitedThreshold, RadarrQualityItem.PreferredUnlimitedThreshold, true}
+            {QualitySizeItem.PreferredUnlimitedThreshold, QualitySizeItem.PreferredUnlimitedThreshold, true}
     };
 
     [TestCaseSource(nameof(PreferredTestValues))]
     public void PreferredDifferent_WithVariousValues_ReturnsExpectedResult(decimal guideValue, decimal? radarrValue,
         bool isDifferent)
     {
-        var data = new RadarrQualityItem("", 0, 0, guideValue);
+        var data = new QualitySizeItem("", 0, 0, guideValue);
         data.IsPreferredDifferent(radarrValue)
             .Should().Be(isDifferent);
     }
@@ -35,19 +35,19 @@ public class RadarrQualityDataTest
         {
             400m,
             1.0m,
-            RadarrQualityItem.PreferredUnlimitedThreshold
+            QualitySizeItem.PreferredUnlimitedThreshold
         },
         new[]
         {
-            RadarrQualityItem.PreferredUnlimitedThreshold,
+            QualitySizeItem.PreferredUnlimitedThreshold,
             1.0m,
-            RadarrQualityItem.PreferredUnlimitedThreshold
+            QualitySizeItem.PreferredUnlimitedThreshold
         },
         new[]
         {
-            RadarrQualityItem.PreferredUnlimitedThreshold - 1m,
+            QualitySizeItem.PreferredUnlimitedThreshold - 1m,
             1.0m,
-            RadarrQualityItem.PreferredUnlimitedThreshold - 1m
+            QualitySizeItem.PreferredUnlimitedThreshold - 1m
         },
         new[]
         {
@@ -67,54 +67,54 @@ public class RadarrQualityDataTest
     public void InterpolatedPreferred_VariousValues_ExpectedResults(decimal max, decimal ratio,
         decimal expectedResult)
     {
-        var data = new RadarrQualityItem("", 0, max, 0);
+        var data = new QualitySizeItem("", 0, max, 0);
         data.InterpolatedPreferred(ratio).Should().Be(expectedResult);
     }
 
     [Test]
     public void AnnotatedPreferred_OutsideThreshold_EqualsSameValueWithUnlimited()
     {
-        const decimal testVal = RadarrQualityItem.PreferredUnlimitedThreshold;
-        var data = new RadarrQualityItem("", 0, 0, testVal);
+        const decimal testVal = QualitySizeItem.PreferredUnlimitedThreshold;
+        var data = new QualitySizeItem("", 0, 0, testVal);
         data.AnnotatedPreferred.Should().Be($"{testVal} (Unlimited)");
     }
 
     [Test]
     public void AnnotatedPreferred_WithinThreshold_EqualsSameStringValue()
     {
-        const decimal testVal = RadarrQualityItem.PreferredUnlimitedThreshold - 1;
-        var data = new RadarrQualityItem("", 0, 0, testVal);
+        const decimal testVal = QualitySizeItem.PreferredUnlimitedThreshold - 1;
+        var data = new QualitySizeItem("", 0, 0, testVal);
         data.AnnotatedPreferred.Should().Be($"{testVal}");
     }
 
     [Test]
     public void Preferred_AboveThreshold_EqualsSameValue()
     {
-        const decimal testVal = RadarrQualityItem.PreferredUnlimitedThreshold + 1;
-        var data = new RadarrQualityItem("", 0, 0, testVal);
+        const decimal testVal = QualitySizeItem.PreferredUnlimitedThreshold + 1;
+        var data = new QualitySizeItem("", 0, 0, testVal);
         data.Preferred.Should().Be(testVal);
     }
 
     [Test]
     public void PreferredForApi_AboveThreshold_EqualsNull()
     {
-        const decimal testVal = RadarrQualityItem.PreferredUnlimitedThreshold + 1;
-        var data = new RadarrQualityItem("", 0, 0, testVal);
+        const decimal testVal = QualitySizeItem.PreferredUnlimitedThreshold + 1;
+        var data = new QualitySizeItem("", 0, 0, testVal);
         data.PreferredForApi.Should().Be(null);
     }
 
     [Test]
     public void PreferredForApi_HighestWithinThreshold_EqualsSameValue()
     {
-        const decimal testVal = RadarrQualityItem.PreferredUnlimitedThreshold - 0.1m;
-        var data = new RadarrQualityItem("", 0, 0, testVal);
+        const decimal testVal = QualitySizeItem.PreferredUnlimitedThreshold - 0.1m;
+        var data = new QualitySizeItem("", 0, 0, testVal);
         data.PreferredForApi.Should().Be(testVal).And.Be(data.Preferred);
     }
 
     [Test]
     public void PreferredForApi_LowestWithinThreshold_EqualsSameValue()
     {
-        var data = new RadarrQualityItem("", 0, 0, 0);
+        var data = new QualitySizeItem("", 0, 0, 0);
         data.PreferredForApi.Should().Be(0);
     }
 }
diff --git a/src/TrashLib.Tests/Sonarr/QualityDefinition/SonarrQualityDataTest.cs b/src/TrashLib.Tests/Sonarr/QualityDefinition/SonarrQualityDataTest.cs
index c108ebb3..2359630c 100644
--- a/src/TrashLib.Tests/Sonarr/QualityDefinition/SonarrQualityDataTest.cs
+++ b/src/TrashLib.Tests/Sonarr/QualityDefinition/SonarrQualityDataTest.cs
@@ -1,12 +1,12 @@
 using FluentAssertions;
 using NUnit.Framework;
-using TrashLib.Services.Common.QualityDefinition;
+using TrashLib.Services.QualitySize.Guide;
 
 namespace TrashLib.Tests.Sonarr.QualityDefinition;
 
 [TestFixture]
 [Parallelizable(ParallelScope.All)]
-public class SonarrQualityDataTest
+public class QualitySizeDataTest
 {
     private static readonly object[] MaxTestValues =
     {
diff --git a/src/TrashLib/Config/Services/ServiceConfiguration.cs b/src/TrashLib/Config/Services/ServiceConfiguration.cs
index 49e0f664..885ebabd 100644
--- a/src/TrashLib/Config/Services/ServiceConfiguration.cs
+++ b/src/TrashLib/Config/Services/ServiceConfiguration.cs
@@ -16,6 +16,8 @@ public abstract class ServiceConfiguration : IServiceConfiguration
         new List<CustomFormatConfig>();
 
     public bool DeleteOldCustomFormats { get; init; }
+
+    public QualityDefinitionConfig? QualityDefinition { get; init; }
 }
 
 [UsedImplicitly(ImplicitUseTargetFlags.WithMembers)]
@@ -34,3 +36,10 @@ public class QualityProfileScoreConfig
     public int? Score { get; init; }
     public bool ResetUnmatchedScores { get; init; }
 }
+
+[UsedImplicitly(ImplicitUseTargetFlags.WithMembers)]
+public class QualityDefinitionConfig
+{
+    public string Type { get; init; } = "";
+    public decimal? PreferredRatio { get; set; }
+}
diff --git a/src/TrashLib/Services/Common/IGuideService.cs b/src/TrashLib/Services/Common/IGuideService.cs
index 736ec9a8..19105a15 100644
--- a/src/TrashLib/Services/Common/IGuideService.cs
+++ b/src/TrashLib/Services/Common/IGuideService.cs
@@ -1,8 +1,10 @@
 using TrashLib.Services.CustomFormat.Models;
+using TrashLib.Services.QualitySize;
 
 namespace TrashLib.Services.Common;
 
 public interface IGuideService
 {
     ICollection<CustomFormatData> GetCustomFormatData();
+    ICollection<QualitySizeData> GetQualities();
 }
diff --git a/src/TrashLib/Services/QualitySize/Api/IQualityDefinitionService.cs b/src/TrashLib/Services/QualitySize/Api/IQualityDefinitionService.cs
new file mode 100644
index 00000000..21c909be
--- /dev/null
+++ b/src/TrashLib/Services/QualitySize/Api/IQualityDefinitionService.cs
@@ -0,0 +1,7 @@
+namespace TrashLib.Services.QualitySize.Api;
+
+public interface IQualityDefinitionService
+{
+    Task<List<ServiceQualityDefinitionItem>> GetQualityDefinition();
+    Task<IList<ServiceQualityDefinitionItem>> UpdateQualityDefinition(IList<ServiceQualityDefinitionItem> newQuality);
+}
diff --git a/src/TrashLib/Services/Radarr/QualityDefinition/Api/QualityDefinitionService.cs b/src/TrashLib/Services/QualitySize/Api/QualityDefinitionService.cs
similarity index 50%
rename from src/TrashLib/Services/Radarr/QualityDefinition/Api/QualityDefinitionService.cs
rename to src/TrashLib/Services/QualitySize/Api/QualityDefinitionService.cs
index 6a89dd0b..722613d8 100644
--- a/src/TrashLib/Services/Radarr/QualityDefinition/Api/QualityDefinitionService.cs
+++ b/src/TrashLib/Services/QualitySize/Api/QualityDefinitionService.cs
@@ -1,8 +1,7 @@
 using Flurl.Http;
 using TrashLib.Config.Services;
-using TrashLib.Services.Radarr.QualityDefinition.Api.Objects;
 
-namespace TrashLib.Services.Radarr.QualityDefinition.Api;
+namespace TrashLib.Services.QualitySize.Api;
 
 internal class QualityDefinitionService : IQualityDefinitionService
 {
@@ -13,17 +12,17 @@ internal class QualityDefinitionService : IQualityDefinitionService
         _service = service;
     }
 
-    public async Task<List<RadarrQualityDefinitionItem>> GetQualityDefinition()
+    public async Task<List<ServiceQualityDefinitionItem>> GetQualityDefinition()
     {
         return await _service.Request("qualitydefinition")
-            .GetJsonAsync<List<RadarrQualityDefinitionItem>>();
+            .GetJsonAsync<List<ServiceQualityDefinitionItem>>();
     }
 
-    public async Task<IList<RadarrQualityDefinitionItem>> UpdateQualityDefinition(
-        IList<RadarrQualityDefinitionItem> newQuality)
+    public async Task<IList<ServiceQualityDefinitionItem>> UpdateQualityDefinition(
+        IList<ServiceQualityDefinitionItem> newQuality)
     {
         return await _service.Request("qualityDefinition", "update")
             .PutJsonAsync(newQuality)
-            .ReceiveJson<List<RadarrQualityDefinitionItem>>();
+            .ReceiveJson<List<ServiceQualityDefinitionItem>>();
     }
 }
diff --git a/src/TrashLib/Services/Radarr/QualityDefinition/Api/Objects/RadarrQualityDefinitionItem.cs b/src/TrashLib/Services/QualitySize/Api/ServiceQualityDefinitionItem.cs
similarity index 75%
rename from src/TrashLib/Services/Radarr/QualityDefinition/Api/Objects/RadarrQualityDefinitionItem.cs
rename to src/TrashLib/Services/QualitySize/Api/ServiceQualityDefinitionItem.cs
index a3614f14..50c3f395 100644
--- a/src/TrashLib/Services/Radarr/QualityDefinition/Api/Objects/RadarrQualityDefinitionItem.cs
+++ b/src/TrashLib/Services/QualitySize/Api/ServiceQualityDefinitionItem.cs
@@ -1,9 +1,9 @@
 using JetBrains.Annotations;
 
-namespace TrashLib.Services.Radarr.QualityDefinition.Api.Objects;
+namespace TrashLib.Services.QualitySize.Api;
 
 [UsedImplicitly(ImplicitUseTargetFlags.WithMembers)]
-public class RadarrQualityItem
+public class ServiceQualityItem
 {
     public int Id { get; set; }
     public string Modifier { get; set; } = "";
@@ -13,10 +13,10 @@ public class RadarrQualityItem
 }
 
 [UsedImplicitly(ImplicitUseTargetFlags.WithMembers)]
-public class RadarrQualityDefinitionItem
+public class ServiceQualityDefinitionItem
 {
     public int Id { get; set; }
-    public RadarrQualityItem? Quality { get; set; }
+    public ServiceQualityItem? Quality { get; set; }
     public string Title { get; set; } = "";
     public int Weight { get; set; }
     public decimal MinSize { get; set; }
diff --git a/src/TrashLib/Services/Common/QualityDefinition/QualityItem.cs b/src/TrashLib/Services/QualitySize/Guide/QualityItem.cs
similarity index 95%
rename from src/TrashLib/Services/Common/QualityDefinition/QualityItem.cs
rename to src/TrashLib/Services/QualitySize/Guide/QualityItem.cs
index 55ac1136..1f341b2f 100644
--- a/src/TrashLib/Services/Common/QualityDefinition/QualityItem.cs
+++ b/src/TrashLib/Services/QualitySize/Guide/QualityItem.cs
@@ -1,7 +1,7 @@
 using System.Globalization;
 using System.Text;
 
-namespace TrashLib.Services.Common.QualityDefinition;
+namespace TrashLib.Services.QualitySize.Guide;
 
 public class QualityItem
 {
diff --git a/src/TrashLib/Services/Common/QualityDefinition/QualityGuideParser.cs b/src/TrashLib/Services/QualitySize/Guide/QualitySizeGuideParser.cs
similarity index 87%
rename from src/TrashLib/Services/Common/QualityDefinition/QualityGuideParser.cs
rename to src/TrashLib/Services/QualitySize/Guide/QualitySizeGuideParser.cs
index 503d6e08..5ca26f50 100644
--- a/src/TrashLib/Services/Common/QualityDefinition/QualityGuideParser.cs
+++ b/src/TrashLib/Services/QualitySize/Guide/QualitySizeGuideParser.cs
@@ -5,13 +5,13 @@ using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
 using Serilog;
 
-namespace TrashLib.Services.Common.QualityDefinition;
+namespace TrashLib.Services.QualitySize.Guide;
 
-internal class QualityGuideParser<T> where T : class
+internal class QualitySizeGuideParser<T> where T : class
 {
     private readonly ILogger _log;
 
-    public QualityGuideParser(ILogger log)
+    public QualitySizeGuideParser(ILogger log)
     {
         _log = log;
     }
diff --git a/src/TrashLib/Services/QualitySize/IQualitySizeUpdater.cs b/src/TrashLib/Services/QualitySize/IQualitySizeUpdater.cs
new file mode 100644
index 00000000..db44ee7c
--- /dev/null
+++ b/src/TrashLib/Services/QualitySize/IQualitySizeUpdater.cs
@@ -0,0 +1,9 @@
+using TrashLib.Config.Services;
+using TrashLib.Services.Common;
+
+namespace TrashLib.Services.QualitySize;
+
+public interface IQualitySizeUpdater
+{
+    Task Process(bool isPreview, QualityDefinitionConfig config, IGuideService guideService);
+}
diff --git a/src/TrashLib/Services/QualitySize/QualitySizeData.cs b/src/TrashLib/Services/QualitySize/QualitySizeData.cs
new file mode 100644
index 00000000..41eff958
--- /dev/null
+++ b/src/TrashLib/Services/QualitySize/QualitySizeData.cs
@@ -0,0 +1,8 @@
+namespace TrashLib.Services.QualitySize;
+
+public record QualitySizeData(
+    // ReSharper disable once NotAccessedPositionalProperty.Global
+    string TrashId,
+    string Type,
+    IReadOnlyCollection<QualitySizeItem> Qualities
+);
diff --git a/src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityItem.cs b/src/TrashLib/Services/QualitySize/QualitySizeItem.cs
similarity index 77%
rename from src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityItem.cs
rename to src/TrashLib/Services/QualitySize/QualitySizeItem.cs
index 9882fffd..0f3d1298 100644
--- a/src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityItem.cs
+++ b/src/TrashLib/Services/QualitySize/QualitySizeItem.cs
@@ -1,10 +1,10 @@
-using TrashLib.Services.Common.QualityDefinition;
+using TrashLib.Services.QualitySize.Guide;
 
-namespace TrashLib.Services.Radarr.QualityDefinition;
+namespace TrashLib.Services.QualitySize;
 
-public class RadarrQualityItem : QualityItem
+public class QualitySizeItem : QualityItem
 {
-    public RadarrQualityItem(string quality, decimal min, decimal max, decimal preferred)
+    public QualitySizeItem(string quality, decimal min, decimal max, decimal preferred)
         : base(quality, min, max)
     {
         Preferred = preferred;
diff --git a/src/TrashLib/Services/QualitySize/QualitySizeUpdater.cs b/src/TrashLib/Services/QualitySize/QualitySizeUpdater.cs
new file mode 100644
index 00000000..95a865ce
--- /dev/null
+++ b/src/TrashLib/Services/QualitySize/QualitySizeUpdater.cs
@@ -0,0 +1,127 @@
+using CliFx.Infrastructure;
+using Common.Extensions;
+using Serilog;
+using TrashLib.Config.Services;
+using TrashLib.Services.Common;
+using TrashLib.Services.QualitySize.Api;
+
+namespace TrashLib.Services.QualitySize;
+
+internal class QualitySizeUpdater : IQualitySizeUpdater
+{
+    private readonly ILogger _log;
+    private readonly IQualityDefinitionService _api;
+    private readonly IConsole _console;
+
+    public QualitySizeUpdater(
+        ILogger logger,
+        IQualityDefinitionService api,
+        IConsole console)
+    {
+        _log = logger;
+        _api = api;
+        _console = console;
+    }
+
+    public async Task Process(bool isPreview, QualityDefinitionConfig config, IGuideService guideService)
+    {
+        _log.Information("Processing Quality Definition: {QualityDefinition}", config.Type);
+        var qualityDefinitions = guideService.GetQualities();
+        var qualityTypeInConfig = config.Type;
+
+        var selectedQuality = qualityDefinitions
+            .FirstOrDefault(x => x.Type.EqualsIgnoreCase(qualityTypeInConfig));
+
+        if (selectedQuality == null)
+        {
+            _log.Error("The specified quality definition type does not exist: {Type}", qualityTypeInConfig);
+            return;
+        }
+
+        if (config.PreferredRatio is not null)
+        {
+            _log.Information("Using an explicit preferred ratio which will override values from the guide");
+
+            // Fix an out of range ratio and warn the user
+            if (config.PreferredRatio is < 0 or > 1)
+            {
+                var clampedRatio = Math.Clamp(config.PreferredRatio.Value, 0, 1);
+                _log.Warning("Your `preferred_ratio` of {CurrentRatio} is out of range. " +
+                    "It must be a decimal between 0.0 and 1.0. It has been clamped to {ClampedRatio}",
+                    config.PreferredRatio, clampedRatio);
+
+                config.PreferredRatio = clampedRatio;
+            }
+
+            // Apply a calculated preferred size
+            foreach (var quality in selectedQuality.Qualities)
+            {
+                quality.Preferred = quality.InterpolatedPreferred(config.PreferredRatio.Value);
+            }
+        }
+
+        if (isPreview)
+        {
+            PrintQualityPreview(selectedQuality.Qualities);
+            return;
+        }
+
+        await ProcessQualityDefinition(selectedQuality.Qualities);
+    }
+
+    private void PrintQualityPreview(IReadOnlyCollection<QualitySizeItem> quality)
+    {
+        _console.Output.WriteLine("");
+        const string format = "{0,-20} {1,-10} {2,-15} {3,-15}";
+        _console.Output.WriteLine(format, "Quality", "Min", "Max", "Preferred");
+        _console.Output.WriteLine(format, "-------", "---", "---", "---------");
+
+        foreach (var q in quality)
+        {
+            _console.Output.WriteLine(format, q.Quality, q.AnnotatedMin, q.AnnotatedMax, q.AnnotatedPreferred);
+        }
+
+        _console.Output.WriteLine("");
+    }
+
+    private static bool QualityIsDifferent(ServiceQualityDefinitionItem a, QualitySizeItem b)
+    {
+        return b.IsMinDifferent(a.MinSize) || b.IsMaxDifferent(a.MaxSize) ||
+            a.PreferredSize is not null && b.IsPreferredDifferent(a.PreferredSize);
+    }
+
+    private async Task ProcessQualityDefinition(IReadOnlyCollection<QualitySizeItem> guideQuality)
+    {
+        var serverQuality = await _api.GetQualityDefinition();
+
+        var newQuality = new List<ServiceQualityDefinitionItem>();
+        foreach (var qualityData in guideQuality)
+        {
+            var serverEntry = serverQuality.FirstOrDefault(q => q.Quality?.Name == qualityData.Quality);
+            if (serverEntry == null)
+            {
+                _log.Warning("Server lacks quality definition for {Quality}; it will be skipped", qualityData.Quality);
+                continue;
+            }
+
+            if (!QualityIsDifferent(serverEntry, qualityData))
+            {
+                continue;
+            }
+
+            // Not using the original list again, so it's OK to modify the definition ref type objects in-place.
+            serverEntry.MinSize = qualityData.MinForApi;
+            serverEntry.MaxSize = qualityData.MaxForApi;
+            serverEntry.PreferredSize = qualityData.PreferredForApi;
+            newQuality.Add(serverEntry);
+
+            _log.Debug("Setting Quality " +
+                "[Name: {Name}] [Source: {Source}] [Min: {Min}] [Max: {Max}] [Preferred: {Preferred}]",
+                serverEntry.Quality?.Name, serverEntry.Quality?.Source, serverEntry.MinSize, serverEntry.MaxSize,
+                serverEntry.PreferredSize);
+        }
+
+        await _api.UpdateQualityDefinition(newQuality);
+        _log.Information("Number of updated qualities: {Count}", newQuality.Count);
+    }
+}
diff --git a/src/TrashLib/Services/Radarr/Config/RadarrConfiguration.cs b/src/TrashLib/Services/Radarr/Config/RadarrConfiguration.cs
index 8e996dd8..f680900e 100644
--- a/src/TrashLib/Services/Radarr/Config/RadarrConfiguration.cs
+++ b/src/TrashLib/Services/Radarr/Config/RadarrConfiguration.cs
@@ -6,12 +6,4 @@ namespace TrashLib.Services.Radarr.Config;
 [UsedImplicitly(ImplicitUseTargetFlags.WithMembers)]
 public class RadarrConfiguration : ServiceConfiguration
 {
-    public QualityDefinitionConfig? QualityDefinition { get; init; }
-}
-
-[UsedImplicitly(ImplicitUseTargetFlags.WithMembers)]
-public class QualityDefinitionConfig
-{
-    public string Type { get; init; } = "";
-    public decimal PreferredRatio { get; set; } = 1.0m;
 }
diff --git a/src/TrashLib/Services/Radarr/IRadarrGuideService.cs b/src/TrashLib/Services/Radarr/IRadarrGuideService.cs
index 625a621f..ce1cfd67 100644
--- a/src/TrashLib/Services/Radarr/IRadarrGuideService.cs
+++ b/src/TrashLib/Services/Radarr/IRadarrGuideService.cs
@@ -1,9 +1,7 @@
 using TrashLib.Services.Common;
-using TrashLib.Services.Radarr.QualityDefinition;
 
 namespace TrashLib.Services.Radarr;
 
 public interface IRadarrGuideService : IGuideService
 {
-    ICollection<RadarrQualityData> GetQualities();
 }
diff --git a/src/TrashLib/Services/Radarr/LocalRepoRadarrGuideService.cs b/src/TrashLib/Services/Radarr/LocalRepoRadarrGuideService.cs
index b26c293a..4e19a998 100644
--- a/src/TrashLib/Services/Radarr/LocalRepoRadarrGuideService.cs
+++ b/src/TrashLib/Services/Radarr/LocalRepoRadarrGuideService.cs
@@ -1,9 +1,9 @@
 using Serilog;
 using TrashLib.Repo;
-using TrashLib.Services.Common.QualityDefinition;
 using TrashLib.Services.CustomFormat.Guide;
 using TrashLib.Services.CustomFormat.Models;
-using TrashLib.Services.Radarr.QualityDefinition;
+using TrashLib.Services.QualitySize;
+using TrashLib.Services.QualitySize.Guide;
 
 namespace TrashLib.Services.Radarr;
 
@@ -11,16 +11,16 @@ public class LocalRepoRadarrGuideService : IRadarrGuideService
 {
     private readonly IRepoPathsFactory _pathsFactory;
     private readonly ICustomFormatLoader _cfLoader;
-    private readonly QualityGuideParser<RadarrQualityData> _parser;
+    private readonly QualitySizeGuideParser<QualitySizeData> _parser;
 
     public LocalRepoRadarrGuideService(IRepoPathsFactory pathsFactory, ILogger log, ICustomFormatLoader cfLoader)
     {
         _pathsFactory = pathsFactory;
         _cfLoader = cfLoader;
-        _parser = new QualityGuideParser<RadarrQualityData>(log);
+        _parser = new QualitySizeGuideParser<QualitySizeData>(log);
     }
 
-    public ICollection<RadarrQualityData> GetQualities()
+    public ICollection<QualitySizeData> GetQualities()
         => _parser.GetQualities(_pathsFactory.Create().RadarrQualityPaths);
 
     public ICollection<CustomFormatData> GetCustomFormatData()
diff --git a/src/TrashLib/Services/Radarr/QualityDefinition/Api/IQualityDefinitionService.cs b/src/TrashLib/Services/Radarr/QualityDefinition/Api/IQualityDefinitionService.cs
deleted file mode 100644
index 2049f30f..00000000
--- a/src/TrashLib/Services/Radarr/QualityDefinition/Api/IQualityDefinitionService.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-using TrashLib.Services.Radarr.QualityDefinition.Api.Objects;
-
-namespace TrashLib.Services.Radarr.QualityDefinition.Api;
-
-public interface IQualityDefinitionService
-{
-    Task<List<RadarrQualityDefinitionItem>> GetQualityDefinition();
-    Task<IList<RadarrQualityDefinitionItem>> UpdateQualityDefinition(IList<RadarrQualityDefinitionItem> newQuality);
-}
diff --git a/src/TrashLib/Services/Radarr/QualityDefinition/IRadarrQualityDefinitionUpdater.cs b/src/TrashLib/Services/Radarr/QualityDefinition/IRadarrQualityDefinitionUpdater.cs
deleted file mode 100644
index 8d4d1508..00000000
--- a/src/TrashLib/Services/Radarr/QualityDefinition/IRadarrQualityDefinitionUpdater.cs
+++ /dev/null
@@ -1,8 +0,0 @@
-using TrashLib.Services.Radarr.Config;
-
-namespace TrashLib.Services.Radarr.QualityDefinition;
-
-public interface IRadarrQualityDefinitionUpdater
-{
-    Task Process(bool isPreview, RadarrConfiguration config);
-}
diff --git a/src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityData.cs b/src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityData.cs
deleted file mode 100644
index cdc8ab90..00000000
--- a/src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityData.cs
+++ /dev/null
@@ -1,8 +0,0 @@
-namespace TrashLib.Services.Radarr.QualityDefinition;
-
-public record RadarrQualityData(
-    // ReSharper disable once NotAccessedPositionalProperty.Global
-    string TrashId,
-    string Type,
-    IReadOnlyCollection<RadarrQualityItem> Qualities
-);
diff --git a/src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityDefinitionUpdater.cs b/src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityDefinitionUpdater.cs
deleted file mode 100644
index 8f8adfc3..00000000
--- a/src/TrashLib/Services/Radarr/QualityDefinition/RadarrQualityDefinitionUpdater.cs
+++ /dev/null
@@ -1,130 +0,0 @@
-using CliFx.Infrastructure;
-using Common.Extensions;
-using Serilog;
-using TrashLib.Services.Radarr.Config;
-using TrashLib.Services.Radarr.QualityDefinition.Api;
-using TrashLib.Services.Radarr.QualityDefinition.Api.Objects;
-
-namespace TrashLib.Services.Radarr.QualityDefinition;
-
-internal class RadarrQualityDefinitionUpdater : IRadarrQualityDefinitionUpdater
-{
-    private readonly ILogger _log;
-    private readonly IQualityDefinitionService _api;
-    private readonly IConsole _console;
-    private readonly IRadarrGuideService _guide;
-
-    public RadarrQualityDefinitionUpdater(
-        ILogger logger,
-        IRadarrGuideService guide,
-        IQualityDefinitionService api,
-        IConsole console)
-    {
-        _log = logger;
-        _guide = guide;
-        _api = api;
-        _console = console;
-    }
-
-    public async Task Process(bool isPreview, RadarrConfiguration config)
-    {
-        _log.Information("Processing Quality Definition: {QualityDefinition}", config.QualityDefinition!.Type);
-        var qualityDefinitions = _guide.GetQualities();
-        var qualityTypeInConfig = config.QualityDefinition!.Type;
-
-        var selectedQuality = qualityDefinitions
-            .FirstOrDefault(x => x.Type.EqualsIgnoreCase(qualityTypeInConfig));
-
-        if (selectedQuality == null)
-        {
-            _log.Error("The specified quality definition type does not exist: {Type}", qualityTypeInConfig);
-            return;
-        }
-
-        // Fix an out of range ratio and warn the user
-        if (config.QualityDefinition.PreferredRatio is < 0 or > 1)
-        {
-            var clampedRatio = Math.Clamp(config.QualityDefinition.PreferredRatio, 0, 1);
-            _log.Warning("Your `preferred_ratio` of {CurrentRatio} is out of range. " +
-                         "It must be a decimal between 0.0 and 1.0. It has been clamped to {ClampedRatio}",
-                config.QualityDefinition.PreferredRatio, clampedRatio);
-
-            config.QualityDefinition.PreferredRatio = clampedRatio;
-        }
-
-        // Apply a calculated preferred size
-        foreach (var quality in selectedQuality.Qualities)
-        {
-            quality.Preferred = quality.InterpolatedPreferred(config.QualityDefinition.PreferredRatio);
-        }
-
-        if (isPreview)
-        {
-            PrintQualityPreview(selectedQuality.Qualities);
-            return;
-        }
-
-        await ProcessQualityDefinition(selectedQuality.Qualities);
-    }
-
-    private void PrintQualityPreview(IEnumerable<RadarrQualityItem> quality)
-    {
-        _console.Output.WriteLine("");
-        const string format = "{0,-20} {1,-10} {2,-15} {3,-15}";
-        _console.Output.WriteLine(format, "Quality", "Min", "Max", "Preferred");
-        _console.Output.WriteLine(format, "-------", "---", "---", "---------");
-
-        foreach (var q in quality)
-        {
-            _console.Output.WriteLine(format, q.Quality, q.AnnotatedMin, q.AnnotatedMax, q.AnnotatedPreferred);
-        }
-
-        _console.Output.WriteLine("");
-    }
-
-    private async Task ProcessQualityDefinition(IEnumerable<RadarrQualityItem> guideQuality)
-    {
-        var serverQuality = await _api.GetQualityDefinition();
-        await UpdateQualityDefinition(serverQuality, guideQuality);
-    }
-
-    private async Task UpdateQualityDefinition(IReadOnlyCollection<RadarrQualityDefinitionItem> serverQuality,
-        IEnumerable<RadarrQualityItem> guideQuality)
-    {
-        static bool QualityIsDifferent(RadarrQualityDefinitionItem a, RadarrQualityItem b)
-        {
-            return b.IsMinDifferent(a.MinSize) ||
-                   b.IsMaxDifferent(a.MaxSize) ||
-                   b.IsPreferredDifferent(a.PreferredSize);
-        }
-
-        var newQuality = new List<RadarrQualityDefinitionItem>();
-        foreach (var qualityData in guideQuality)
-        {
-            var entry = serverQuality.FirstOrDefault(q => q.Quality?.Name == qualityData.Quality);
-            if (entry == null)
-            {
-                _log.Warning("Server lacks quality definition for {Quality}; it will be skipped", qualityData.Quality);
-                continue;
-            }
-
-            if (!QualityIsDifferent(entry, qualityData))
-            {
-                continue;
-            }
-
-            // Not using the original list again, so it's OK to modify the definition ref type objects in-place.
-            entry.MinSize = qualityData.MinForApi;
-            entry.MaxSize = qualityData.MaxForApi;
-            entry.PreferredSize = qualityData.PreferredForApi;
-            newQuality.Add(entry);
-
-            _log.Debug("Setting Quality " +
-                       "[Name: {Name}] [Source: {Source}] [Min: {Min}] [Max: {Max}] [Preferred: {Preferred}]",
-                entry.Quality?.Name, entry.Quality?.Source, entry.MinSize, entry.MaxSize, entry.PreferredSize);
-        }
-
-        await _api.UpdateQualityDefinition(newQuality);
-        _log.Information("Number of updated qualities: {Count}", newQuality.Count);
-    }
-}
diff --git a/src/TrashLib/Services/Radarr/RadarrAutofacModule.cs b/src/TrashLib/Services/Radarr/RadarrAutofacModule.cs
index af6dcce9..2e59db20 100644
--- a/src/TrashLib/Services/Radarr/RadarrAutofacModule.cs
+++ b/src/TrashLib/Services/Radarr/RadarrAutofacModule.cs
@@ -1,7 +1,7 @@
 using Autofac;
+using TrashLib.Services.QualitySize;
+using TrashLib.Services.QualitySize.Api;
 using TrashLib.Services.Radarr.Config;
-using TrashLib.Services.Radarr.QualityDefinition;
-using TrashLib.Services.Radarr.QualityDefinition.Api;
 
 namespace TrashLib.Services.Radarr;
 
@@ -12,7 +12,7 @@ public class RadarrAutofacModule : Module
         builder.RegisterType<QualityDefinitionService>().As<IQualityDefinitionService>();
         builder.RegisterType<RadarrGuideDataLister>().As<IRadarrGuideDataLister>();
         builder.RegisterType<RadarrValidationMessages>().As<IRadarrValidationMessages>();
-        builder.RegisterType<RadarrQualityDefinitionUpdater>().As<IRadarrQualityDefinitionUpdater>();
+        builder.RegisterType<QualitySizeUpdater>().As<IQualitySizeUpdater>();
         builder.RegisterType<LocalRepoRadarrGuideService>().As<IRadarrGuideService>();
         builder.RegisterType<RadarrGuideDataLister>().As<IRadarrGuideDataLister>();
         builder.RegisterType<RadarrCompatibility>();
diff --git a/src/TrashLib/Services/Sonarr/Config/SonarrConfiguration.cs b/src/TrashLib/Services/Sonarr/Config/SonarrConfiguration.cs
index 067a2257..3b61ac95 100644
--- a/src/TrashLib/Services/Sonarr/Config/SonarrConfiguration.cs
+++ b/src/TrashLib/Services/Sonarr/Config/SonarrConfiguration.cs
@@ -7,8 +7,6 @@ public class SonarrConfiguration : ServiceConfiguration
 {
     public IList<ReleaseProfileConfig> ReleaseProfiles { get; [UsedImplicitly] init; } =
         Array.Empty<ReleaseProfileConfig>();
-
-    public string QualityDefinition { get; [UsedImplicitly] init; } = "";
 }
 
 public class ReleaseProfileConfig
diff --git a/src/TrashLib/Services/Sonarr/QualityDefinition/ISonarrQualityDefinitionUpdater.cs b/src/TrashLib/Services/Sonarr/QualityDefinition/ISonarrQualityDefinitionUpdater.cs
deleted file mode 100644
index 7be18a50..00000000
--- a/src/TrashLib/Services/Sonarr/QualityDefinition/ISonarrQualityDefinitionUpdater.cs
+++ /dev/null
@@ -1,8 +0,0 @@
-using TrashLib.Services.Sonarr.Config;
-
-namespace TrashLib.Services.Sonarr.QualityDefinition;
-
-public interface ISonarrQualityDefinitionUpdater
-{
-    Task Process(bool isPreview, SonarrConfiguration config);
-}
diff --git a/src/TrashLib/Services/Sonarr/QualityDefinition/SonarrQualityData.cs b/src/TrashLib/Services/Sonarr/QualityDefinition/SonarrQualityData.cs
deleted file mode 100644
index 064d8766..00000000
--- a/src/TrashLib/Services/Sonarr/QualityDefinition/SonarrQualityData.cs
+++ /dev/null
@@ -1,10 +0,0 @@
-using TrashLib.Services.Common.QualityDefinition;
-
-namespace TrashLib.Services.Sonarr.QualityDefinition;
-
-public record SonarrQualityData(
-    // ReSharper disable once NotAccessedPositionalProperty.Global
-    string TrashId,
-    string Type,
-    IReadOnlyCollection<QualityItem> Qualities
-);
diff --git a/src/TrashLib/Services/Sonarr/QualityDefinition/SonarrQualityDefinitionUpdater.cs b/src/TrashLib/Services/Sonarr/QualityDefinition/SonarrQualityDefinitionUpdater.cs
deleted file mode 100644
index e858364e..00000000
--- a/src/TrashLib/Services/Sonarr/QualityDefinition/SonarrQualityDefinitionUpdater.cs
+++ /dev/null
@@ -1,181 +0,0 @@
-using System.Text.RegularExpressions;
-using CliFx.Infrastructure;
-using Common.Extensions;
-using Serilog;
-using TrashLib.Services.Common.QualityDefinition;
-using TrashLib.Services.Sonarr.Api;
-using TrashLib.Services.Sonarr.Api.Objects;
-using TrashLib.Services.Sonarr.Config;
-using TrashLib.Services.Sonarr.ReleaseProfile.Guide;
-
-namespace TrashLib.Services.Sonarr.QualityDefinition;
-
-internal class SonarrQualityDefinitionUpdater : ISonarrQualityDefinitionUpdater
-{
-    private readonly ILogger _log;
-    private readonly ISonarrApi _api;
-    private readonly IConsole _console;
-    private readonly ISonarrGuideService _guide;
-    private readonly Regex _regexHybrid = new(@"720|1080", RegexOptions.Compiled);
-
-    public SonarrQualityDefinitionUpdater(
-        ILogger logger,
-        ISonarrGuideService guide,
-        ISonarrApi api,
-        IConsole console)
-    {
-        _log = logger;
-        _guide = guide;
-        _api = api;
-        _console = console;
-    }
-
-    private SonarrQualityData? GetQualityOrError(ICollection<SonarrQualityData> qualityDefinitions, string type)
-    {
-        var quality = qualityDefinitions.FirstOrDefault(x => x.Type.EqualsIgnoreCase(type));
-        if (quality is null)
-        {
-            _log.Error(
-                "The following quality definition is required for hybrid, but was not found in the guide: {Type}",
-                type);
-        }
-
-        return quality;
-    }
-
-    public async Task Process(bool isPreview, SonarrConfiguration config)
-    {
-        _log.Information("Processing Quality Definition: {QualityDefinition}", config.QualityDefinition);
-        var qualityDefinitions = _guide.GetQualities();
-        var qualityTypeInConfig = config.QualityDefinition;
-
-        SonarrQualityData? selectedQuality;
-
-        if (config.QualityDefinition.EqualsIgnoreCase("hybrid"))
-        {
-            var animeQuality = GetQualityOrError(qualityDefinitions, "anime");
-            var seriesQuality = GetQualityOrError(qualityDefinitions, "series");
-            if (animeQuality is null || seriesQuality is null)
-            {
-                return;
-            }
-
-            selectedQuality = BuildHybridQuality(animeQuality.Qualities, seriesQuality.Qualities);
-        }
-        else
-        {
-            selectedQuality = qualityDefinitions
-                .FirstOrDefault(x => x.Type.EqualsIgnoreCase(qualityTypeInConfig));
-
-            if (selectedQuality == null)
-            {
-                _log.Error("The specified quality definition type does not exist: {Type}", qualityTypeInConfig);
-                return;
-            }
-        }
-
-        if (isPreview)
-        {
-            PrintQualityPreview(selectedQuality.Qualities);
-            return;
-        }
-
-        await ProcessQualityDefinition(selectedQuality.Qualities);
-    }
-
-    private SonarrQualityData BuildHybridQuality(
-        IReadOnlyCollection<QualityItem> anime,
-        IReadOnlyCollection<QualityItem> series)
-    {
-        _log.Information(
-            "Notice: Hybrid only functions on 720/1080 qualities and uses non-anime values for the rest (e.g. 2160)");
-
-        var hybrid = new List<QualityItem>();
-        foreach (var left in series)
-        {
-            // Any qualities that anime doesn't care about get immediately added from Series quality
-            var match = _regexHybrid.Match(left.Quality);
-            if (!match.Success)
-            {
-                _log.Debug("Using 'Series' Quality For: {QualityName}", left.Quality);
-                hybrid.Add(left);
-                continue;
-            }
-
-            // If there's a quality in Series that Anime doesn't know about, we add the Series quality
-            var right = anime.FirstOrDefault(row => row.Quality == left.Quality);
-            if (right == null)
-            {
-                _log.Error("Could not find matching anime quality for series quality named {QualityName}",
-                    left.Quality);
-                hybrid.Add(left);
-                continue;
-            }
-
-            hybrid.Add(new QualityItem(left.Quality,
-                Math.Min(left.Min, right.Min),
-                Math.Max(left.Max, right.Max)));
-        }
-
-        return new SonarrQualityData("", "hybrid", hybrid);
-    }
-
-    private void PrintQualityPreview(IEnumerable<QualityItem> quality)
-    {
-        _console.Output.WriteLine("");
-        const string format = "{0,-20} {1,-10} {2,-15}";
-        _console.Output.WriteLine(format, "Quality", "Min", "Max");
-        _console.Output.WriteLine(format, "-------", "---", "---");
-
-        foreach (var q in quality)
-        {
-            _console.Output.WriteLine(format, q.Quality, q.AnnotatedMin, q.AnnotatedMax);
-        }
-
-        _console.Output.WriteLine("");
-    }
-
-    private async Task ProcessQualityDefinition(IEnumerable<QualityItem> guideQuality)
-    {
-        var serverQuality = await _api.GetQualityDefinition();
-        await UpdateQualityDefinition(serverQuality, guideQuality);
-    }
-
-    private async Task UpdateQualityDefinition(IReadOnlyCollection<SonarrQualityDefinitionItem> serverQuality,
-        IEnumerable<QualityItem> guideQuality)
-    {
-        static bool QualityIsDifferent(SonarrQualityDefinitionItem a, QualityItem b)
-        {
-            return b.IsMinDifferent(a.MinSize) ||
-                   b.IsMaxDifferent(a.MaxSize);
-        }
-
-        var newQuality = new List<SonarrQualityDefinitionItem>();
-        foreach (var qualityData in guideQuality)
-        {
-            var entry = serverQuality.FirstOrDefault(q => q.Quality?.Name == qualityData.Quality);
-            if (entry == null)
-            {
-                _log.Warning("Server lacks quality definition for {Quality}; it will be skipped", qualityData.Quality);
-                continue;
-            }
-
-            if (!QualityIsDifferent(entry, qualityData))
-            {
-                continue;
-            }
-
-            // Not using the original list again, so it's OK to modify the definition ref type objects in-place.
-            entry.MinSize = qualityData.MinForApi;
-            entry.MaxSize = qualityData.MaxForApi;
-            newQuality.Add(entry);
-
-            _log.Debug("Setting Quality " +
-                       "[Name: {Name}] [Source: {Source}] [Min: {Min}] [Max: {Max}]",
-                entry.Quality?.Name, entry.Quality?.Source, entry.MinSize, entry.MaxSize);
-        }
-
-        await _api.UpdateQualityDefinition(newQuality);
-        _log.Information("Number of updated qualities: {Count}", newQuality.Count);
-    }
-}
diff --git a/src/TrashLib/Services/Sonarr/ReleaseProfile/Guide/ISonarrGuideService.cs b/src/TrashLib/Services/Sonarr/ReleaseProfile/Guide/ISonarrGuideService.cs
index fd3ed526..3cde8f2b 100644
--- a/src/TrashLib/Services/Sonarr/ReleaseProfile/Guide/ISonarrGuideService.cs
+++ b/src/TrashLib/Services/Sonarr/ReleaseProfile/Guide/ISonarrGuideService.cs
@@ -1,5 +1,4 @@
 using TrashLib.Services.Common;
-using TrashLib.Services.Sonarr.QualityDefinition;
 
 namespace TrashLib.Services.Sonarr.ReleaseProfile.Guide;
 
@@ -7,5 +6,4 @@ public interface ISonarrGuideService : IGuideService
 {
     IReadOnlyCollection<ReleaseProfileData> GetReleaseProfileData();
     ReleaseProfileData? GetUnfilteredProfileById(string trashId);
-    ICollection<SonarrQualityData> GetQualities();
 }
diff --git a/src/TrashLib/Services/Sonarr/ReleaseProfile/Guide/LocalRepoSonarrGuideService.cs b/src/TrashLib/Services/Sonarr/ReleaseProfile/Guide/LocalRepoSonarrGuideService.cs
index 7c1ab38f..bc60f5f1 100644
--- a/src/TrashLib/Services/Sonarr/ReleaseProfile/Guide/LocalRepoSonarrGuideService.cs
+++ b/src/TrashLib/Services/Sonarr/ReleaseProfile/Guide/LocalRepoSonarrGuideService.cs
@@ -5,10 +5,10 @@ using MoreLinq;
 using Newtonsoft.Json;
 using Serilog;
 using TrashLib.Repo;
-using TrashLib.Services.Common.QualityDefinition;
 using TrashLib.Services.CustomFormat.Guide;
 using TrashLib.Services.CustomFormat.Models;
-using TrashLib.Services.Sonarr.QualityDefinition;
+using TrashLib.Services.QualitySize;
+using TrashLib.Services.QualitySize.Guide;
 using TrashLib.Services.Sonarr.ReleaseProfile.Filters;
 
 namespace TrashLib.Services.Sonarr.ReleaseProfile.Guide;
@@ -19,7 +19,7 @@ public class LocalRepoSonarrGuideService : ISonarrGuideService
     private readonly ILogger _log;
     private readonly ICustomFormatLoader _cfLoader;
     private readonly Lazy<IEnumerable<ReleaseProfileData>> _data;
-    private readonly QualityGuideParser<SonarrQualityData> _parser;
+    private readonly QualitySizeGuideParser<QualitySizeData> _parser;
 
     public LocalRepoSonarrGuideService(
         IRepoPathsFactory pathsFactory,
@@ -30,10 +30,10 @@ public class LocalRepoSonarrGuideService : ISonarrGuideService
         _log = log;
         _cfLoader = cfLoader;
         _data = new Lazy<IEnumerable<ReleaseProfileData>>(GetReleaseProfileDataImpl);
-        _parser = new QualityGuideParser<SonarrQualityData>(log);
+        _parser = new QualitySizeGuideParser<QualitySizeData>(log);
     }
 
-    public ICollection<SonarrQualityData> GetQualities()
+    public ICollection<QualitySizeData> GetQualities()
         => _parser.GetQualities(_pathsFactory.Create().SonarrQualityPaths);
 
     public ICollection<CustomFormatData> GetCustomFormatData()
diff --git a/src/TrashLib/Services/Sonarr/SonarrAutofacModule.cs b/src/TrashLib/Services/Sonarr/SonarrAutofacModule.cs
index bab771a0..ad8b661f 100644
--- a/src/TrashLib/Services/Sonarr/SonarrAutofacModule.cs
+++ b/src/TrashLib/Services/Sonarr/SonarrAutofacModule.cs
@@ -2,7 +2,6 @@ using Autofac;
 using Autofac.Extras.Ordering;
 using TrashLib.Services.Sonarr.Api;
 using TrashLib.Services.Sonarr.Config;
-using TrashLib.Services.Sonarr.QualityDefinition;
 using TrashLib.Services.Sonarr.ReleaseProfile;
 using TrashLib.Services.Sonarr.ReleaseProfile.Filters;
 using TrashLib.Services.Sonarr.ReleaseProfile.Guide;
@@ -33,8 +32,5 @@ public class SonarrAutofacModule : Module
                 typeof(StrictNegativeScoresFilter))
             .As<IReleaseProfileFilter>()
             .OrderByRegistration();
-
-        // Quality Definition Support
-        builder.RegisterType<SonarrQualityDefinitionUpdater>().As<ISonarrQualityDefinitionUpdater>();
     }
 }