Quote Originally Posted by SpacedCowboy View Post
Cool - that's encouraging. Thanks

To be honest, I'd not thought it would be an issue for a CAD program to do what I wanted, but then I tried Sketchup, and it fails to render or cope with the tiny-resolution (0.003" x 0.05") channels I'll need to allow the air out of the moulds when the plastic is injected. Hence the questions

I'll have a look through the tutorials when I get my PC (for the first time in my life, I'm buying a PC to run windows...). I'm guessing I could probably run the s/w under VMWare, but I'll need an actual honest-to-god parallel port for the CAM part, so I figured I might as well get a dedicated PC...

Thanks for the help,

Simon
Are you calculating for expansion and contraction in the solid model???