I guess some might have had problems with HPI plastic but I sure have not on any of my 4 HPI vehicles. I do no a couple of times HPI had problems with air bubbles in there plastic parts and they where weak but I never got any. Yes I agree the first time you take the wheel nuts they do not hold well again so I just put a drop of blue loctite and have never had one come off.

rcnz when you put your truck on the ground does it move at idle or will it sit still on level ground with out applying the brakes? If it only turns with the wheels off the ground but does not creep when on the ground it is OK.

rccrazynut yes check your slipper adjustment.