WinChart3D Element Colors

I need to set the colors of the points that show up in the 3D scatterchart. I've tried using the FillWceneGraph event and setting the Primitive i.e. p.PE.Fill = Color.Red; unfortunately this does nothing for me. I used a filter to look for primitives with a valid row identifying whether it represents a data row then set the fill but no help.

Another issue is the size of the sphere. I want to make it smaller than it is.

Any assistance would be much appreciated.