Thanks.
Actually, one of the rear shocks broke.

I replaced them all with 3Racing DF03 V2 dampers. Rear tyres were nearly bald after 3 runs on Grass!!! I'm trying dirt hawgs and dirt paws soon for a bit more milage?
Realistically, this model is a low end budget Tamiya and would happily run stock probably forever if well looked after. Things only started breaking when obscene brushless power was added. I'm pretty rough with it as the car is usually pinned full throttle or the nephews will say something like, 'is that it'?
Note - I'm still using the plastic hex's on rear wheels and they are fine. Same with gearbox, no wear. The gearbox is strong in this one (Darth).