RE: MRC/ACADEMY SBV2 "Pro"
I have the SB V2 Pro with a mamba max 5700 unit and didn't have any gear issues. The main thing to remember is that diff spring and slipper spring takes longer to seat properly than what you may be used to, especially if you don't pre-compress the springs. Once that is done, i would run a few 1 minute runs and reset both each time. After a heat or two (5 minute total runs) it should set and keep.
5700 was a blast in the buggy.