I am trying to make a clamp to hold a ball about 3.5" in dia. So I would like to make a bowl shape in a peice of wood for the top and bottom, (a mold). I am having trouble getting started. I am using Mach3, Auto CAD R14, and Corel draw X3, on a vertical mill. Could some one point me in the right direction?

Thanks
cut2spec

I answered this at CNC Zone.