I am a specialist at 3D CAD mechanical design. I have been designing prototype machinery and automation for 43 years now, in Canada. I can build any machine in 3D solids, and I can even make parts of the machine semi transparent so that one can see the relationship of interior moving parts. I can add "virtual" motors to the machines and make them run, then save the running machine as a video clip. Brian www.rupnowdesign.com