Like I said, I'm just looking to screw around with it, right now. I designed a car in sketchup & it was doable but, painfully laborious. I don't want to commit to a trial program with a short term window. & "right now" I don't want to pay good money for something I may use for a couple weeks. I appreciate the info & it may be of future use. I looked at rhinoceros & it looked like a lot of fun. I just can't throw that kind of money into brainfart