diff --git a/Machining/DemoBuildMachiningProject.cs b/Machining/DemoBuildMachiningProject.cs
index 48fec56..1344537 100644
--- a/Machining/DemoBuildMachiningProject.cs
+++ b/Machining/DemoBuildMachiningProject.cs
@@ -64,11 +64,11 @@ public static class DemoBuildMachiningProject
 			InnerBeamProfile = new FluteDependentRatioProfile(),
 			MillingCutterOptLimit = new MillingCutterOptOption(),
 		};
-		//build FluteContourTray property 
+		//build Fluting property
 		double helixAngle_deg = 50;
 		double radialRakeAngle_deg = 15;
 		double bottomOuterRadius_mm = diameter_mm / 2 - roundRadius_mm;
-		millingCutter.FluteContourTray = new UniformContourTray()
+		millingCutter.Fluting = new UniformFluting()
 		{
 			TrackNum = 3,
 			BaselineOneContour = new FluteContour()
@@ -111,10 +111,10 @@ public static class DemoBuildMachiningProject
 			MillingCutterOptLimit = new MillingCutterOptOption()
 		};
 
-		//build FluteContourTray property 
+		//build Fluting property
 		double helixAngle_deg = 50;
 		double radialRakeAngle_deg = 15;
-		millingCutter.FluteContourTray = new UniformContourTray()
+		millingCutter.Fluting = new UniformFluting()
 		{
 			TrackNum = 3,
 			BaselineOneContour = new FluteContour()