diff --git a/Assets/Cryville/Crtr/Chart.cs b/Assets/Cryville/Crtr/Chart.cs
index 20c6345..614752b 100644
--- a/Assets/Cryville/Crtr/Chart.cs
+++ b/Assets/Cryville/Crtr/Chart.cs
@@ -242,6 +242,7 @@ namespace Cryville.Crtr {
 		}
 	}
 
+	[JsonConverter(typeof(ChartCompatibilityHandler))]
 	public class Chart : EventContainer {
 		[JsonRequired]
 		public long format; // Format Version
@@ -308,40 +309,7 @@ namespace Cryville.Crtr {
 			private void LoadFromString(string s) {
 				if (Node != null)
 					throw new InvalidOperationException("The motion property can only be set at initialization");
-				Match m = Regex.Match(s, @"^([0-9A-Za-z_]+)(#(\d+))?(.+)?$");
-				if (!m.Success) throw new ArgumentException("Invalid motion string format");
-				name = new Identifier(m.Groups[1].Value);
-				var registry = ChartPlayer.motionRegistry[name];
-				Node = new MotionNode();
-				if (m.Groups[3].Success) {
-					short id = short.Parse(m.Groups[3].Value);
-					if (id < 0) throw new ArgumentException("Got negative motion node index");
-					Node.Id = id;
-				}
-				if (m.Groups[4].Success) {
-					_itor.SetSource(m.Groups[4].Value);
-					while (_itor.Position < _itor.Source.Length) {
-						var c = _itor.GetChar();
-						var exp = _itor.GetExp();
-						switch (c) {
-							case '@':
-								ChartPlayer.etor.Evaluate(_vecop, exp);
-								Node.Time = new Vec1(_vecbuf);
-								break;
-							case '~':
-								ChartPlayer.etor.Evaluate(_vecop, exp);
-								Node.EndTime = new Vec1(_vecbuf);
-								break;
-							case ':':
-								ChartPlayer.etor.Evaluate(_vecop, exp);
-								Node.Value = Vector.Construct(ChartPlayer.motionRegistry[Name].Type, _vecbuf);
-								break;
-							default:
-								throw new ArgumentException("Invalid motion string format");
-						}
-					}
-				}
-				else Node.Reset = true;
+				ChartCompatibilityHandler.MotionStringParser.Parse(s, out name, out Node);
 				SubmitPropSrc("value", new VectorSrc(() => Node.Value));
 			}
 
diff --git a/Assets/Cryville/Crtr/ChartCompatibilityHandler.cs b/Assets/Cryville/Crtr/ChartCompatibilityHandler.cs
new file mode 100644
index 0000000..2773653
--- /dev/null
+++ b/Assets/Cryville/Crtr/ChartCompatibilityHandler.cs
@@ -0,0 +1,122 @@
+using Cryville.Common;
+using Cryville.Common.Pdt;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+using System;
+using System.Text.RegularExpressions;
+
+namespace Cryville.Crtr {
+	public class ChartCompatibilityHandler : CustomCreationConverter<Chart> {
+		public static IMotionStringParser MotionStringParser { get; private set; }
+		public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) {
+			var obj = JToken.ReadFrom(reader);
+			switch (obj["format"].ToObject<int>()) {
+				case 2: MotionStringParser = MotionStringParser2.Instance; break;
+				case 3: MotionStringParser = MotionStringParser3.Instance; break;
+				default: throw new FormatException("Unsupported chart format");
+			}
+			return base.ReadJson(obj.CreateReader(), objectType, existingValue, serializer);
+		}
+		public override Chart Create(Type objectType) {
+			return new Chart();
+		}
+		public interface IMotionStringParser {
+			void Parse(string str, out Identifier name, out MotionNode node);
+		}
+		class MotionStringParser2 : IMotionStringParser {
+			static MotionStringParser2 _instance;
+			public static MotionStringParser2 Instance {
+				get {
+					if (_instance == null)
+						_instance = new MotionStringParser2();
+					return _instance;
+				}
+			}
+			static readonly PdtFragmentInterpreter _itor = new PdtFragmentInterpreter();
+			static readonly PropOp _vecop = new VectorOp(v => _vecbuf = v);
+			static float[] _vecbuf;
+			public void Parse(string str, out Identifier name, out MotionNode node) {
+				Match m = Regex.Match(str, @"^(.+?)(#(\d+))?(@(.+?))?(\^(.+?))?(\*(.+?))?(:(.+))?$");
+				if (!m.Success) throw new ArgumentException("Invalid motion string format");
+				name = new Identifier(m.Groups[1].Value);
+				var registry = ChartPlayer.motionRegistry[name];
+				if (m.Groups[3].Success) {
+					short id = short.Parse(m.Groups[3].Value);
+					if (id < 0) throw new ArgumentException("Got negative motion node index");
+					Vec1 time = m.Groups[5].Success ? new Vec1(float.Parse(m.Groups[5].Value)) : null;
+					/*byte? trs = m.Groups[7].Success ? byte.Parse(m.Groups[7].Value) : null;
+					Vec1 rate = m.Groups[9].Success ? new Vec1(float.Parse(m.Groups[9].Value)) : null;*/
+					Vector value = m.Groups[11].Success ? Vector.Construct(registry.Type, ParseVector(m.Groups[11].Value)) : null;
+					node = new MotionNode {
+						Id = id,
+						Time = time,
+						Value = value
+					};
+				}
+				else {
+					node = new MotionNode {
+						Value = Vector.Construct(registry.Type, ParseVector(m.Groups[11].Value))
+					};
+				}
+			}
+			float[] ParseVector(string str) {
+				var comps = str.Split(',');
+				for (int i = 0; i < comps.Length; i++) {
+					if (comps[i] == "") comps[i] = "0";
+				}
+				_itor.SetSource(string.Format("({0});", string.Join(',', comps)));
+				ChartPlayer.etor.Evaluate(_vecop, _itor.GetExp());
+				return _vecbuf;
+			}
+		}
+		class MotionStringParser3 : IMotionStringParser {
+			static MotionStringParser3 _instance;
+			public static MotionStringParser3 Instance {
+				get {
+					if (_instance == null)
+						_instance = new MotionStringParser3();
+					return _instance;
+				}
+			}
+			static readonly PdtFragmentInterpreter _itor = new PdtFragmentInterpreter();
+			static readonly PropOp _vecop = new VectorOp(v => _vecbuf = v);
+			static float[] _vecbuf;
+			public void Parse(string str, out Identifier name, out MotionNode node) {
+				Match m = Regex.Match(str, @"^([0-9A-Za-z_]+)(#(\d+))?(.+)?$");
+				if (!m.Success) throw new ArgumentException("Invalid motion string format");
+				name = new Identifier(m.Groups[1].Value);
+				node = new MotionNode();
+				if (m.Groups[3].Success) {
+					short id = short.Parse(m.Groups[3].Value);
+					if (id < 0) throw new ArgumentException("Got negative motion node index");
+					node.Id = id;
+				}
+				if (m.Groups[4].Success) {
+					_itor.SetSource(m.Groups[4].Value);
+					while (_itor.Position < _itor.Source.Length) {
+						var c = _itor.GetChar();
+						var exp = _itor.GetExp();
+						switch (c) {
+							case '@':
+								ChartPlayer.etor.Evaluate(_vecop, exp);
+								node.Time = new Vec1(_vecbuf);
+								break;
+							case '~':
+								ChartPlayer.etor.Evaluate(_vecop, exp);
+								node.EndTime = new Vec1(_vecbuf);
+								break;
+							case ':':
+								ChartPlayer.etor.Evaluate(_vecop, exp);
+								node.Value = Vector.Construct(ChartPlayer.motionRegistry[name].Type, _vecbuf);
+								break;
+							default:
+								throw new ArgumentException("Invalid motion string format");
+						}
+					}
+				}
+				else node.Reset = true;
+			}
+		}
+	}
+}
diff --git a/Assets/Cryville/Crtr/ChartCompatibilityHandler.cs.meta b/Assets/Cryville/Crtr/ChartCompatibilityHandler.cs.meta
new file mode 100644
index 0000000..9ec7ed7
--- /dev/null
+++ b/Assets/Cryville/Crtr/ChartCompatibilityHandler.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a4c3afb80951eef4caf51bf11e473605
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Cryville/Crtr/ChartPlayer.cs b/Assets/Cryville/Crtr/ChartPlayer.cs
index ae74e5c..a2b1a42 100644
--- a/Assets/Cryville/Crtr/ChartPlayer.cs
+++ b/Assets/Cryville/Crtr/ChartPlayer.cs
@@ -608,7 +608,6 @@ namespace Cryville.Crtr {
 					MissingMemberHandling = MissingMemberHandling.Error
 				});
 
-				if (chart.format != 3) throw new FormatException("Invalid chart file format version");
 				Logger.Log("main", 0, "Load/WorkerThread", "Applying ruleset (iteration 1)"); loadPregress = .10f;
 				pruleset.PrePatch(chart);