I recently download the extensions for Revit and was playing with the wall reinforcing tool. Which has a lot of potential use in our office, the first problem that I ran into was that we like to model our openings in our core with the opening component instead of the wall opening tool, and the extension doesn't recognize the opening component. I would hate to have to return back to the wall opening tool as I find it cumbersome to manipulate to the size that I really what.