Changed the rear diff to revos stock one, seems to run fine and at the same time added couple fans over the motor and esc. Temps were: esc around 40C (104F), motor around 40C (104F) and batterys 23C (73F) without body. I think it will still run too hot with the body on, maybe couple holes to it helps, we'll see. And I noticed that the pinion and spur mesh were too tight, now it rolls much better. Found out the braking weirdness too, it was set too low from the radio
. Still have to find the damn solder joint
Padding for the batterys
Btw, any tricks for the spurs nylock, it keeps popping out, already tryed loctite..