[junkman]

The losi mount is pretty thick. I don't know how long the shaft sticks out of the end of a medusa, but it would probably be pretty close to making the shaft too short if you spaced it back to make up for the bearing. I have a cc2200, which has a pretty long shaft, and the pinion doesn't really go on it all that far. I just use 3mm screws, and have had no problems. The pinions suck that come with the kit, the mount is thick, it comes with a metal spur as well instead of them giving you the plastic one? I guess the radio box is a nice touch. I would just buy the rcm mount, losi tray, and radio box, if I had it to do over again.