J.Robinson---The software is Solidworks. The unfortunate thing is, that to post any of the models I create on a forum, I have to save them as a .jpg and post the .jpg for viewing. The clarity of the .jpg is only about 70 percent of the actual Solidworks model. If you could see the files I create in their original 3D Solidworks format, it would just blow your socks off!!! (If you like viewing 3D models, have a look at the portfolio in my web page www.rupnowdesign.com )---Brian