Stripped the centre diff on the Kraton down today, after it was a bit raspy on hard acceleration and intermittent no drive. The gears had dislodged, but seem pretty OK, so put it back together. Ever so slightly notchy, but I'll give it a go before replacing it.
Do you ever race/compete with the RC stuff, or just go and play with yourself - as it were? 
I used to watch some races as a kid, never had the money to get into it though.
I used to competitively race electric off-road buggies, but slowly got more dragged into helping run the local club and on race days often ended up missing my heats due to being short or Marshalls or needing somebody operating the timing computers, or helping some of the younger members fix their cars. Plus to be at the level I was getting to was starting to become ridiculously expensive, and sponsorships were rare back then. Essentially you would cook the new £40 batteries on your charger, perfectly timed some they would still be over temp as the start signal went off, to get that extra punch from it. After a couple of weekends like that, all those packs were shagged... ...ignoring the ones that catastrophically let go during the race because you did overheat them, always an impressive sight

Nowadays, I tend to be on my Todd, or pre lockdown with a few mates. With the cars normally we're blatting about like kids, rather than racing. The chap I usually go (pre lockdown) flying RC stuff with, we tend to only have one craft in the air at a time, whilst the other one spots.