I have made a nice 2' octagonal window family (the octagonal window from the Revit Autodesk site is a hex after all) with grids that I can turn on and off. I would like parameters to make its size adjustable (say 1' or 3' or whatever) but after many many hours I just can't seem to make it work. Could this be a rare instance outside the capabilities of Revit or is it my abilities in question?

Bill Maddox