- bearings seem ok - spinning freely

- temps are a smidge higher than I like. I have a heat gun and use it often, currently temps are 170ish with the smallest pinion I can fit (15t)

- tires are large and heavy and do have high traction:
https://www.horizonhobby.com/DYNW0041?KPID=DYNW0041&CAWELAID=320011980001424900 &CAGPSPN=pla&CAAGID=37462622311&CATCI=aud-112431678027la-531206008942&gclid=EAIaIQobChMI4N-w2qb44AIVoxx9Ch1jfQb8EAQYASABEgIso_D_BwE

- surface is grass, which is surprisingly high-traction. It would be safe to say there were plenty of landings that brought all four tires down on the grass pretty hard, resulting in stress on the entire drivetrain

- I think the diff case was ok - it was only a month or two old.

With all that said, I don’t have the space or the skills to really put the ET48 through the sort of stuff you see on YouTube, so it doesn’t seem like I am anywhere near any real edges of durability.

Oh, in case it helps, this is all for a general bashing use case. I don’t have any tracks near me.