diff --git a/SecretAPI/Debugging/PrefabDebugger.cs b/SecretAPI/Debugging/PrefabDebugger.cs
index e7b28c6..98b5f3f 100644
--- a/SecretAPI/Debugging/PrefabDebugger.cs
+++ b/SecretAPI/Debugging/PrefabDebugger.cs
@@ -18,7 +18,6 @@ namespace SecretAPI.Debugging;
 /// <summary>
 /// Debugs base-game prefabs by logging information about them.
 /// </summary>
-// ? Possibly write to file instead of server console?
 internal static class PrefabDebugger
 {
     /// <summary>
diff --git a/SecretAPI/Extensions/MirrorExtensions.cs b/SecretAPI/Extensions/MirrorExtensions.cs
index 0e1fcdc..55a1078 100644
--- a/SecretAPI/Extensions/MirrorExtensions.cs
+++ b/SecretAPI/Extensions/MirrorExtensions.cs
@@ -64,7 +64,10 @@ public static void SendFakeRpcMessage(this Player target, NetworkBehaviour behav
     public static void SendFakeSyncListData<T>(this Player target, NetworkBehaviour behaviour, ulong listIndex, SyncListChange<T> change)
     {
         if (listIndex <= 0)
+        {
             Logger.Warn($"[MirrorExtensions.SendFakeSyncListData] Index is {listIndex} - Expected 1 or higher!: + {new StackTrace()}");
+            return; // avoid client kick
+        }
 
         SendFakeState(target, behaviour, writer =>
         {
diff --git a/SecretAPI/Features/DecalHelpers.cs b/SecretAPI/Features/DecalHelpers.cs
index 2283287..ce5f76e 100644
--- a/SecretAPI/Features/DecalHelpers.cs
+++ b/SecretAPI/Features/DecalHelpers.cs
@@ -15,9 +15,7 @@ namespace SecretAPI.Features;
 /// </summary>
 public static class DecalHelpers
 {
-    private static bool hasData = false;
-    private static ItemType itemType = ItemType.None;
-    private static byte subcomponentIndex = 0;
+    private static AutoSyncData? autoSyncData;
 
     /// <summary>
     /// Creates an <see cref="AutosyncMessage"/> for spawning a decal that can be sent to players.
@@ -31,16 +29,16 @@ public static AutosyncMessage GetDecalMessage(Vector3 position, Vector3 startPos
         RelativePosition hitPoint = new(position);
         RelativePosition startRaycastPoint = new(startPosition);
 
-        (ItemType itemTypeId, byte moduleIndex) = GetItemData();
+        AutoSyncData data = GetAutoSyncData();
 
-        using NetworkWriterPooled? writer = NetworkWriterPool.Get();
-        writer.WriteByte(moduleIndex);
+        using NetworkWriterPooled writer = NetworkWriterPool.Get();
+        writer.WriteByte(data.SubcomponentIndex);
         writer.WriteSubheader(ImpactEffectsModule.RpcType.ImpactDecal);
         writer.WriteByte((byte)type);
         writer.WriteRelativePosition(hitPoint);
         writer.WriteRelativePosition(startRaycastPoint);
 
-        return new AutosyncMessage(writer, new ItemIdentifier(itemTypeId, 0));
+        return new AutosyncMessage(writer, new ItemIdentifier(data.ItemType, 0));
     }
 
     /// <summary>
@@ -88,24 +86,24 @@ public static void SpawnDecalFromDirection(Vector3 position, Vector3 direction,
     public static void SpawnDecalFromDirection(Vector3 position, Quaternion direction, DecalPoolType type = DecalPoolType.Blood)
         => GetDecalMessage(position, position - (direction * Vector3.forward), type).SendToAuthenticated();
 
-    private static (ItemType ItemType, byte SubcomponentIndex) GetItemData()
+    private static AutoSyncData GetAutoSyncData()
     {
-        if (hasData)
-            return (itemType, subcomponentIndex);
+        if (autoSyncData != null)
+            return autoSyncData;
 
-        foreach (ModularAutosyncItem? autoItem in ModularAutosyncItem.AllTemplates)
+        foreach (ModularAutosyncItem autoItem in ModularAutosyncItem.AllTemplates)
         {
             for (byte b = 0; b < autoItem.AllSubcomponents.Length; b++)
             {
                 if (autoItem.AllSubcomponents[b] is not ImpactEffectsModule)
                     continue;
-                subcomponentIndex = b;
-                itemType = autoItem.ItemTypeId;
-                hasData = true;
-                return (itemType, subcomponentIndex);
+
+                return autoSyncData = new AutoSyncData(autoItem.ItemTypeId, b);
             }
         }
 
         throw new InvalidOperationException("Couldn't find the `InventorySystem.Items.Firearms.Modules.ImpactEffectsModule` in the any ModularAutosyncItem!");
     }
+
+    private sealed record AutoSyncData(ItemType ItemType, byte SubcomponentIndex);
 }
\ No newline at end of file
diff --git a/SecretAPI/Features/Effects/CustomPlayerEffect.cs b/SecretAPI/Features/Effects/CustomPlayerEffect.cs
index dc7d58c..13699b4 100644
--- a/SecretAPI/Features/Effects/CustomPlayerEffect.cs
+++ b/SecretAPI/Features/Effects/CustomPlayerEffect.cs
@@ -10,23 +10,54 @@
 
 using Logger = LabApi.Features.Console.Logger;
 
+// ! PLEASE NW MAKE CUSTOM EFFECTS GOOD I'M GONNA CRY
+
 /// <summary>
 /// Handles custom player effects.
-/// <remarks>Must register to <see cref="EffectsToRegister"/> to work.</remarks>
+/// <remarks>Must register with <see cref="Register"/> in order to work.</remarks>
 /// </summary>
 public abstract class CustomPlayerEffect : StatusEffectBase
 {
     /// <summary>
     /// Gets a list of types to register (Must inherit <see cref="StatusEffectBase"/>).
-    /// <remarks>Must be <see cref="Type"/>, can be gotten through <code>typeof(Scp207)</code></remarks>
     /// </summary>
-    public static List<Type> EffectsToRegister { get; } = [];
+    [Obsolete("This is becoming readonly in 4.0 - Use Register<T>()")]
+    public static List<Type> EffectsToRegister { get; } = []; // TODO 4.0: private static HashSet<Type> RegisteredEffects
 
     /// <summary>
     /// Gets the <see cref="Player"/> with this effect.
     /// </summary>
     public Player Owner => field ??= Player.Get(Hub);
 
+    /// <summary>
+    /// Registers a custom effect type.
+    /// </summary>
+    /// <typeparam name="T">The effect type to register.</typeparam>
+    public static void Register<T>()
+        where T : StatusEffectBase => Register(typeof(T));
+
+    /// <summary>
+    /// Registers a custom effect type.
+    /// </summary>
+    /// <param name="type">The <see cref="Type"/> to register. May not be abstract and must inherit <see cref="StatusEffectBase"/>.</param>
+    public static void Register(Type type)
+    {
+        if (!type.IsAssignableFrom(typeof(StatusEffectBase)))
+        {
+            Logger.Error($"[CustomPlayerEffect.Register] {type.FullName} does not inherit StatusEffectBase!");
+            return;
+        }
+
+        if (type.IsAbstract)
+        {
+            Logger.Error($"[CustomPlayerEffect.Register] {type.FullName} is abstract!");
+            return;
+        }
+
+#pragma warning disable CS0618 // Type or member is obsolete
+        EffectsToRegister.Add(type);
+    }
+
     /// <inheritdoc/>
     public override string ToString() => $"{GetType().Name}: Owner ({Owner}) - Intensity ({Intensity}) - Duration {Duration}";
 
@@ -41,6 +72,9 @@ internal static void Initialize()
         EffectsToRegister.Add(typeof(Depleted));
         EffectsToRegister.Add(typeof(BlastResistance));
 
+        // it would probably be better to patch PlayerEffectsController::Awake instead of using sceneLoaded
+        // this would also allow registering after players join
+        // although the current way might be the fastest since its just base unity handling it on the prefab
         SceneManager.sceneLoaded += OnSceneLoaded;
     }
 
diff --git a/SecretAPI/Features/Effects/CustomTickingPlayerEffect.cs b/SecretAPI/Features/Effects/CustomTickingPlayerEffect.cs
index b948220..3355e49 100644
--- a/SecretAPI/Features/Effects/CustomTickingPlayerEffect.cs
+++ b/SecretAPI/Features/Effects/CustomTickingPlayerEffect.cs
@@ -4,7 +4,7 @@
 using UnityEngine;
 
 /// <summary>
-/// Custom Effect for <see cref="TickingEffectBase"/>.
+/// Custom version of <see cref="TickingEffectBase"/> for <see cref="CustomPlayerEffect"/>.
 /// </summary>
 public abstract class CustomTickingPlayerEffect : CustomPlayerEffect
 {
diff --git a/SecretAPI/Features/UserSettings/CustomSetting.cs b/SecretAPI/Features/UserSettings/CustomSetting.cs
index 011a44c..5715e44 100644
--- a/SecretAPI/Features/UserSettings/CustomSetting.cs
+++ b/SecretAPI/Features/UserSettings/CustomSetting.cs
@@ -58,9 +58,8 @@ protected CustomSetting(ServerSpecificSettingBase setting)
     public ServerSpecificSettingBase Base { get; }
 
     /// <summary>
-    /// Gets the known owner.
+    /// Gets the known owner or <see langword="null"/> on the initial object.
     /// </summary>
-    /// <remarks>This is null on the original object.</remarks>
     public Player? KnownOwner { get; private set; }
 
     /// <summary>
@@ -75,7 +74,7 @@ protected CustomSetting(ServerSpecificSettingBase setting)
     public SettingResponseType LastUpdateType { get; private set; } = SettingResponseType.None;
 
     /// <summary>
-    /// Gets  a value indicating whether the current value received is different to that prior to the most recent <see cref="CustomSetting.HandleSettingUpdate"/> call.
+    /// Gets a value indicating whether the current value received is different to that prior to the most recent <see cref="CustomSetting.HandleSettingUpdate"/> call.
     /// </summary>
     public virtual bool HasValueChanged { get; } = false;
 
@@ -154,10 +153,7 @@ public bool IsShared
         set => CollectionId = value ? byte.MinValue : byte.MaxValue;
     }
 
-    /// <summary>
-    /// Registers a collection of settings.
-    /// </summary>
-    /// <param name="settings">The settings to register.</param>
+    /// <inheritdoc cref="Register(IEnumerable{CustomSetting})"/>
     public static void Register(params CustomSetting[] settings) => Register((IEnumerable<CustomSetting>)settings);
 
     /// <summary>
@@ -173,11 +169,8 @@ public static void Register(IEnumerable<CustomSetting> settings)
         }
     }
 
-    /// <summary>
-    /// Unregisters collection of settings.
-    /// </summary>
-    /// <param name="settings">The settings to unregister.</param>
-    public static void UnRegister(params CustomSetting[] settings) => CustomSettings.RemoveAll(settings.Contains);
+    /// <inheritdoc cref="UnRegister(IEnumerable{CustomSetting})"/>
+    public static void UnRegister(params CustomSetting[] settings) => UnRegister((IEnumerable<CustomSetting>)settings);
 
     /// <summary>
     /// Unregisters a collection of settings.
@@ -185,6 +178,15 @@ public static void Register(IEnumerable<CustomSetting> settings)
     /// <param name="settings">The settings to unregister.</param>
     public static void UnRegister(IEnumerable<CustomSetting> settings) => CustomSettings.RemoveAll(settings.Contains);
 
+    /// <inheritdoc cref="UnRegister(IEnumerable{Type})"/>
+    public static void UnRegister(params Type[] types) => UnRegister((IEnumerable<Type>)types);
+
+    /// <summary>
+    /// Unregisters a collection of setting based on their <see cref="Type"/>.
+    /// </summary>
+    /// <param name="types">A collection of setting types to unregister. This should be the exact type, not the base.</param>
+    public static void UnRegister(IEnumerable<Type> types) => CustomSettings.RemoveAll(s => types.Any(t => s.GetType() == t));
+
     /// <summary>
     /// Tries to get player specific setting.
     /// </summary>