I am playing around with Alibre ([URL="http://www.Alibre.com"]www.Alibre.com[/URL]) a low-to-mid 3D parametric model. The Express version is actually free (limited to a 10 part assembly). Anyway, it's much like Inventor and SolidWorks, but less than 00 for the full version. I like it, but I am just wondering if it has a wide user base out here? Anyone tried (or trying) it? Would love to hear from you, and if you all think this sofware will make it to the mainstream user base.