diff --git a/Blocks3D.vcproj b/Blocks3D.vcproj
index bcdeae6..a114f7b 100644
--- a/Blocks3D.vcproj
+++ b/Blocks3D.vcproj
@@ -81,7 +81,7 @@
 				SuppressStartupBanner="true"
 				ProgramDatabaseFile=".\Release/Blocks3D.pdb"
 				SubSystem="2"
-				StackReserveSize="8388608"
+				StackReserveSize="16777216"
 				TargetMachine="1"
 			/>
 			<Tool
@@ -180,7 +180,7 @@
 				GenerateDebugInformation="true"
 				ProgramDatabaseFile=".\Debug/Blocks3D.pdb"
 				SubSystem="1"
-				StackReserveSize="8388608"
+				StackReserveSize="16777216"
 				TargetMachine="1"
 			/>
 			<Tool
diff --git a/src/source/Application.cpp b/src/source/Application.cpp
index 41833fd..8f35791 100644
--- a/src/source/Application.cpp
+++ b/src/source/Application.cpp
@@ -346,9 +346,9 @@ void Application::onSimulation(RealTime rdt, SimTime sdt, SimTime idt) {
 			p->setParent(NULL);
 			delete p;
 		}
-		for(int i = 0; i < 10; i++)
+		for(int i = 0; i < 4; i++)
 		{
-			_dataModel->getEngine()->step(0.05F);
+			_dataModel->getEngine()->step(0.03F);
 		}
 		onLogic();
 		
diff --git a/src/source/DataModelV2/PartInstance.cpp b/src/source/DataModelV2/PartInstance.cpp
index f9a8210..0ffb10d 100644
--- a/src/source/DataModelV2/PartInstance.cpp
+++ b/src/source/DataModelV2/PartInstance.cpp
@@ -259,7 +259,6 @@ void PartInstance::setCFrameNoSync(CoordinateFrame coordinateFrame)
 {
 	cFrame = coordinateFrame;
 	position = coordinateFrame.translation;
-	changed = true;
 }
 
 bool PartInstance::collides(PartInstance * part)
diff --git a/src/source/XplicitNgine/XplicitNgine.cpp b/src/source/XplicitNgine/XplicitNgine.cpp
index c29b77c..e1efa61 100644
--- a/src/source/XplicitNgine/XplicitNgine.cpp
+++ b/src/source/XplicitNgine/XplicitNgine.cpp
@@ -15,7 +15,7 @@ XplicitNgine::XplicitNgine()
 	physSpace = dHashSpaceCreate(0);
 	contactgroup = dJointGroupCreate(0);
 
-	dWorldSetGravity(physWorld, 0, -0.5, 0);
+	dWorldSetGravity(physWorld, 0, -9.8, 0);
 	dWorldSetAutoDisableFlag(physWorld, 1);
 	dWorldSetAutoDisableLinearThreshold(physWorld, 0.05F);
 	dWorldSetAutoDisableAngularThreshold(physWorld, 0.05F);
@@ -141,7 +141,7 @@ void XplicitNgine::createBody(PartInstance* partInstance)
 		}
 		
 		dMass mass;
-		mass.setBox(partSize.x, partSize.y, partSize.z, 0.7F);
+		mass.setBox(sqrt(partSize.x*2), sqrt(partSize.y*2), sqrt(partSize.z*2), 0.7F);
 		dBodySetMass(partInstance->physBody, &mass);
 
 		// Debug output
@@ -198,8 +198,9 @@ void XplicitNgine::step(float stepSize)
 {	
 	dJointGroupEmpty(contactgroup);
 	dSpaceCollide (physSpace,0,&collisionCallback);
-	//dWorldQuickStep(physWorld, stepSize);
-	dWorldStepFast1(physWorld, stepSize, 20);
+	dWorldQuickStep(physWorld, stepSize);
+	//dWorldStepFast1(physWorld, stepSize*2, 100);
+	//dWorldStep(physWorld, stepSize);
 }
 
 void XplicitNgine::updateBody(PartInstance *partInstance, CoordinateFrame * cFrame)