BritishIdeas

I played around with my Sketchup model a bit and vastly improved the flutes on the end mills. Here is a Kerkythea render

Rendering Sketchup Models with Kerkythea

I have stumbled across a large list of low cost and free CAD programs, mostly for Windows however. It seems there are many good choices in the list and I will try out a couple in the next day or two.