[bdebde]

Not sure about the RCM mount, I have done 12/46 on my muggy with home made mount and finned neu. There is nothing in the way, so if the slots are long enough in the mount (I suspect they are), it should be no problem. The kyosho spurs will fit the center diff, but some cups may need a touch of sanding around the edges to fit. I had one that i had chucked in a drill and ran on sandpaper for several seconds and fit perfect. The other problem I had was the screw heads would rub on the factory diff support, I had at first just countersunk the holes a bit farther, but later found a different brand of screws with slightly smaller heads so I did not have to redo the countersink every time I replaced the spur. That being said, I replaced the plastic spur several times before I just went to metal gears, the muggy is awful heavy and with a powerful setup, can be quite hard on the plastic gears.