The problem is the "pocket" where this sits on the A100. It isn't like a car where the gear is just floating in space. There is a small pocket that is constrained on 3 sides (2 being the frame) that it has to fit into. Also there isn't a coupler, the steering shaft and and tube are part of the gear. There would be a lot of cutting and hacking I think to try to change to a different gear. There is nothing wrong with this on other than the seals were crumbling.
