I use PTC Pro-Engineer Wildfire 4.0 to do the solid modeling. Then I just plot all the points by hand. Takes a long time to design a block from scratch. Mastercam is CRAZY complicated. You have to take a course on it, even as a mechanical engineer to be familiar with it.
I did draft up the "E" from the evga logo, found an acceptable radius for the curve which was what I was looking for. Was debating on milling it into the top surface of a block, but I not sure if EVGA would appreciate me using their logo on a block.
In the meantime I have been keeping busy:
Expect more pics in the very near future ;)