I'm looking at my controller and thinking that I can build something similar to FPS freak in CAD. The only three things I can think of would be a double tap trigger attachment, PS3 analog sticks, and a controller faceplate. For the controller faceplate, I would be thinking of adding some sort of extra ergononomic design. That would be pretty tough to do in solid works though with all of those curves around the controller. Does anyone have any other ideas of an external modification for my controller?