diff --git a/Assets/Cryville/Crtr/PdtBinder.cs b/Assets/Cryville/Crtr/PdtBinder.cs
new file mode 100644
index 0000000..579adf7
--- /dev/null
+++ b/Assets/Cryville/Crtr/PdtBinder.cs
@@ -0,0 +1,91 @@
+using Cryville.Common;
+using Cryville.Common.Pdt;
+using System;
+using System.Globalization;
+using System.Text.RegularExpressions;
+using SIdentifier = Cryville.Common.Identifier;
+
+namespace Cryville.Crtr {
+	public class PdtBinder : EmptyBinder {
+		public override object ChangeType(object value, Type type, CultureInfo culture) {
+			if (value is PdtExpression) {
+				var exp = (PdtExpression)value;
+				if (type.Equals(typeof(bool))) {
+					bool result = false;
+					ChartPlayer.etor.Evaluate(new PropOp.Boolean(r => result = r), exp);
+					return result;
+				}
+				else if (type.Equals(typeof(int))) {
+					int result = 0;
+					ChartPlayer.etor.Evaluate(new PropOp.Integer(r => result = r), exp);
+					return result;
+				}
+				else if (type.Equals(typeof(float))) {
+					float result = 0;
+					ChartPlayer.etor.Evaluate(new PropOp.Float(r => result = r), exp);
+					return result;
+				}
+				else if (type.Equals(typeof(string))) {
+					string result = default(string);
+					ChartPlayer.etor.Evaluate(new PropOp.String(r => result = r), exp);
+					return result;
+				}
+				else if (type.Equals(typeof(Clip))) {
+					Clip result = default(Clip);
+					ChartPlayer.etor.Evaluate(new PropOp.Clip(r => result = r), exp);
+					return result;
+				}
+				else if (type.Equals(typeof(Identifier))) {
+					Identifier result = default(Identifier);
+					ChartPlayer.etor.Evaluate(new pop_identstr(r => result = r), exp);
+					return result;
+				}
+				else if (type.Equals(typeof(Identifier[]))) {
+					Identifier[] result = null;
+					ChartPlayer.etor.Evaluate(new pop_identstrarr(r => result = r), exp);
+					return result;
+				}
+			}
+			else if (value is string) {
+				var exp = (string)value;
+				if (type.Equals(typeof(Identifier))) {
+					return (Identifier)exp;
+				}
+				else if (type == typeof(ScoreOperation)) {
+					var m = Regex.Match(exp, @"^(\S+)\s*?(\S+)?$");
+					var name = new Identifier(m.Groups[1].Value);
+					if (!m.Groups[2].Success) return new ScoreOperation { name = name };
+					var op = new Identifier(m.Groups[2].Value);
+					return new ScoreOperation { name = name, op = op };
+				}
+			}
+			return base.ChangeType(value, type, culture);
+		}
+#pragma warning disable IDE1006
+		class pop_identstr : PropOp {
+			readonly Action<SIdentifier> _cb;
+			public pop_identstr(Action<SIdentifier> cb) { _cb = cb; }
+			protected override void Execute() {
+				var op = GetOperand(0);
+				if (op.Type == PdtInternalType.Undefined) _cb(new SIdentifier(op.AsIdentifier()));
+				else if (op.Type == PdtInternalType.String) _cb(new SIdentifier(op.AsString()));
+				else throw new InvalidCastException("Not an identifier or string");
+			}
+		}
+		class pop_identstrarr : PdtOperator {
+			readonly Action<SIdentifier[]> _cb;
+			public pop_identstrarr(Action<SIdentifier[]> cb) : base(16) { _cb = cb; }
+			protected override void Execute() {
+				var result = new SIdentifier[LoadedOperandCount];
+				for (int i = 0; i < LoadedOperandCount; i++) {
+					var op = GetOperand(i);
+					if (op.Type != PdtInternalType.Undefined)
+						throw new InvalidCastException("Not an identifier");
+					result[i] = new SIdentifier(op.AsIdentifier());
+				}
+				_cb(result);
+			}
+		}
+#pragma warning restore IDE1006
+	}
+}
diff --git a/Assets/Cryville/Crtr/PdtBinder.cs.meta b/Assets/Cryville/Crtr/PdtBinder.cs.meta
new file mode 100644
index 0000000..71a39f2
--- /dev/null
+++ b/Assets/Cryville/Crtr/PdtBinder.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 7ba16fc9fce48644b9c7bd49f2c9121d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/Assets/Cryville/Crtr/Ruleset.cs b/Assets/Cryville/Crtr/Ruleset.cs
index ced1016..54d47d7 100644
--- a/Assets/Cryville/Crtr/Ruleset.cs
+++ b/Assets/Cryville/Crtr/Ruleset.cs
@@ -4,11 +4,8 @@ using Cryville.Crtr.Browsing;
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
-using System.Globalization;
 using System.IO;
 using System.Text;
-using System.Text.RegularExpressions;
-using SIdentifier = Cryville.Common.Identifier;
 
 namespace Cryville.Crtr {
 	public class Ruleset : MetaInfo {
@@ -30,7 +27,7 @@ namespace Cryville.Crtr {
 		}
 	}
 
-	[Binder(typeof(PdtRulesetBinder))]
+	[Binder(typeof(PdtBinder))]
 	public class PdtRuleset {
 		public Dictionary<Identifier, InputDefinition> inputs;
 		public Dictionary<Identifier, JudgeDefinition> judges;
@@ -126,88 +123,6 @@ namespace Cryville.Crtr {
 		Property,
 		Variable,
 	}
-	public class PdtRulesetBinder : EmptyBinder {
-		public override object ChangeType(object value, Type type, CultureInfo culture) {
-			if (value is PdtExpression) {
-				var exp = (PdtExpression)value;
-				if (type.Equals(typeof(bool))) {
-					bool result = false;
-					ChartPlayer.etor.Evaluate(new PropOp.Boolean(r => result = r), exp);
-					return result;
-				}
-				else if (type.Equals(typeof(int))) {
-					int result = 0;
-					ChartPlayer.etor.Evaluate(new PropOp.Integer(r => result = r), exp);
-					return result;
-				}
-				else if (type.Equals(typeof(float))) {
-					float result = 0;
-					ChartPlayer.etor.Evaluate(new PropOp.Float(r => result = r), exp);
-					return result;
-				}
-				else if (type.Equals(typeof(string))) {
-					string result = default(string);
-					ChartPlayer.etor.Evaluate(new PropOp.String(r => result = r), exp);
-					return result;
-				}
-				else if (type.Equals(typeof(Clip))) {
-					Clip result = default(Clip);
-					ChartPlayer.etor.Evaluate(new PropOp.Clip(r => result = r), exp);
-					return result;
-				}
-				else if (type.Equals(typeof(Identifier))) {
-					Identifier result = default(Identifier);
-					ChartPlayer.etor.Evaluate(new pop_identstr(r => result = r), exp);
-					return result;
-				}
-				else if (type.Equals(typeof(Identifier[]))) {
-					Identifier[] result = null;
-					ChartPlayer.etor.Evaluate(new pop_identstrarr(r => result = r), exp);
-					return result;
-				}
-			}
-			else if (value is string) {
-				var exp = (string)value;
-				if (type.Equals(typeof(Identifier))) {
-					return (Identifier)exp;
-				}
-				else if (type == typeof(ScoreOperation)) {
-					var m = Regex.Match(exp, @"^(\S+)\s*?(\S+)?$");
-					var name = new Identifier(m.Groups[1].Value);
-					if (!m.Groups[2].Success) return new ScoreOperation { name = name };
-					var op = new Identifier(m.Groups[2].Value);
-					return new ScoreOperation { name = name, op = op };
-				}
-			}
-			return base.ChangeType(value, type, culture);
-		}
-#pragma warning disable IDE1006
-		class pop_identstr : PropOp {
-			readonly Action<SIdentifier> _cb;
-			public pop_identstr(Action<SIdentifier> cb) { _cb = cb; }
-			protected override void Execute() {
-				var op = GetOperand(0);
-				if (op.Type == PdtInternalType.Undefined) _cb(new SIdentifier(op.AsIdentifier()));
-				else if (op.Type == PdtInternalType.String) _cb(new SIdentifier(op.AsString()));
-				else throw new InvalidCastException("Not an identifier or string");
-			}
-		}
-		class pop_identstrarr : PdtOperator {
-			readonly Action<SIdentifier[]> _cb;
-			public pop_identstrarr(Action<SIdentifier[]> cb) : base(16) { _cb = cb; }
-			protected override void Execute() {
-				var result = new SIdentifier[LoadedOperandCount];
-				for (int i = 0; i < LoadedOperandCount; i++) {
-					var op = GetOperand(i);
-					if (op.Type != PdtInternalType.Undefined)
-						throw new InvalidCastException("Not an identifier");
-					result[i] = new SIdentifier(op.AsIdentifier());
-				}
-				_cb(result);
-			}
-		}
-#pragma warning restore IDE1006
-	}
 	public class RulesetViolationException : Exception {
 		public RulesetViolationException() { }
 		public RulesetViolationException(string message) : base(message) { }
diff --git a/Assets/Cryville/Crtr/Skin.cs b/Assets/Cryville/Crtr/Skin.cs
index a57414d..005bb19 100644
--- a/Assets/Cryville/Crtr/Skin.cs
+++ b/Assets/Cryville/Crtr/Skin.cs
@@ -1,3 +1,4 @@
+using Cryville.Common;
 using Cryville.Common.Pdt;
 using Cryville.Crtr.Browsing;
 using Newtonsoft.Json;
@@ -30,6 +31,7 @@ namespace Cryville.Crtr {
 		}
 	}
 
+	[Binder(typeof(PdtBinder))]
 	public class PdtSkin : SkinElement { }
 
 	public class SkinElement {