> The first and most succesful system that implemented this feature was > certainly Pro-E, they even named the company Parametric.=20 >=20 > Roland Roland, Just as an FYI this Revit system I keep harping about was made by some of the same guys from PTC systems; the creators of Pro-E. It's the same thinking applied to the AEC industry instead. They broke off and made a new company, that was in turn bought out by AutoDesk. Now you see why I'm so fond of it. :) Jeffrey=20