While I like the sexiness of what Jon has proposed, I'm not fully getting how he proposes to accomplish some of the adjustments. Per Bill, and as I understand it, these lenses need the ability to have movement vertically, horizontally and tilt. The gimbal mount affords the tilt forward and back, but not the up/down and side to side in quite the way I think Bill described. Some of the machined solutions and drawings seem to handle that part better.
The biggest issue I see and, it's been mentioned before is the idea of "universal" that can go on any projector and I just see that as hard to impliment with everyone having different cases, round versus square apertures, etc. Even the thickness of the panel it would mount to would create differences in a turnkey solution.