i have both an RC 8 and a SC8 (kmc wheels) and the diffs are very easy to rebuild, it takes longer to drain the oil out then do the rest of the work.

the gears are extremely hard. i raced my rc8 all last season and i am only now changing the spider gears and i dont really have to just as a yearly re-build in our off season. cant say enough how easy these are to work on

cheers gary

ps cut a lap or two for me as we are in our mosoon wet season and i wont get a run until march at the earilest