Thanks for the response! This is definitely from posts read on the 801xt thread... Lots of good info in there. I will poke around a bit more, but this is helpful info - Thanks man!
i believe the kyosho mp9 spur will fit, not 100% sure, i think you may be thinking of my replies on the 801xt thread, where the kyosho st-rr spur fits, on the truggy the entire diff from kyosho will fit, i even used st-rr evo diffs front and rear, i would search in depth as you can on the buggy though, i dont want to steer you wrong and buy unusable parts..
I am just digesting as much of the TRF801 thread as I can get and also buying as much needed spare parts as I can. I bought all of RKHESS' TRF stuff and am rebuilding his buggy at the moment. I only have one spare spur gear (OFNA NeXX8 46t, WAY discontinued) which is why I am sending you a message back-channel please. It looks like you have used other spur gears in this center diff without issue. Can you please tell me more about them?