Pull up TransformHandler.

Assets/Cryville/Crtr/GroupHandler.cs

@@ -4,15 +4,16 @@ using System;
 using UnityEngine;
 
 namespace Cryville.Crtr {
-	public class GroupHandler : ContainerHandler {
-		public ChartHandler ch;
+	public class GroupHandler : TransformHandler {
+		protected override TransformHandler Parent { get { return _ch; } }
+		public ChartHandler _ch;
 
 		ColumnVector<float> coeffs;
 		SquareMatrix matFrame;
 		ContainerState[] tracks;
 
 		public GroupHandler(Chart.Group tg, ChartHandler ch) : base() {
-			this.ch = ch;
+			_ch = ch;
 		}
 		
 		public override string TypeName { get { return "group"; } }