diff --git a/imm/Imm.cs b/imm/Imm.cs
index bb75fe8..f26f36f 100644
--- a/imm/Imm.cs
+++ b/imm/Imm.cs
@@ -97,7 +97,7 @@ public record class Versioned<T> : Imm
 	where T : Versioned<T>
 {
 
-	public delegate void ChangeDelegate( T ZZOld, T next );
+	public delegate void ChangeDelegate( T old, T next );
 
 	public record class MetaData : Meta
 	{
@@ -191,8 +191,8 @@ public record class Recorded<T> : Versioned<T>, imm.Imm
 	new public record class MetaData : Versioned<T>.MetaData
 	{
 		[lib.Dont]
-		public T? ZZOld { get; internal set; }
-		public T? Old => ZZOld;
+		public T? Old_backing { get; internal set; }
+		public T? Old => Old_backing;
 		public string DbgName { get; internal set; } = "";
 		public string DbgPath { get; internal set; } = "";
 		public int    DbgLine { get; internal set; } = -1;
@@ -271,7 +271,7 @@ public record class Recorded<T> : Versioned<T>, imm.Imm
 				Version = orig.Meta.Version + 1,
 				Reason = !string.IsNullOrWhiteSpace( reason ) ? reason : next.Meta.Reason,
 
-				ZZOld = orig,
+				Old_backing = orig,
 				DbgName = dbgName,
 				DbgPath = dbgPath,
 				DbgLine = dbgLine,
@@ -386,7 +386,7 @@ public record class Timed<T> : Recorded<T>, imm.Imm
 				DbgPath = dbgPath,
 				DbgLine = dbgLine,
 				DbgExp = dbgExp,
-				ZZOld = orig,
+				Old_backing = orig,
 
 				//Timed
 				TouchedAt = DateTime.Now,
diff --git a/logging/Log.cs b/logging/Log.cs
index 3c23f28..badb3da 100644
--- a/logging/Log.cs
+++ b/logging/Log.cs
@@ -9,11 +9,7 @@ using System.Reflection;
 using System.Collections.Concurrent;
 using System.Linq;
 using System.Threading;
-using System.Security.Cryptography.X509Certificates;
 using lib.Net;
-using System.Dynamic;
-using System.Xml.Schema;
-using Microsoft.CodeAnalysis.CSharp.Syntax;
 using System.Text;
 //using System.Threading.Tasks;