I've been thinking about doing this to my 360 controller, so that I am able to play some recent, well-reviewed games like Bioshock and Orange Box that don't allow for legacy. It would also make it easier to steer vehicles in Halo. I hesitate to call them "good" games because any game that does not allow standard control options loses quite a few points on my scale.
I want to add at least one switch to manually switch between default and legacy modes, and possibly a second switch to invert the right joystick y-axis.
I am assuming this should be relatively simple, but I would need the right kind of switches, and a good place in the controller to mount them. Any idea/suggestions?