Hi all
Just happened to me twice today, the car have no break at full speed(6.5T with turbo at full) at the end of the straight because the motor was not in contact with the spur gear ! The first time was the chassis screw came off of the front of the motor mount. That time was lucky that I steer and hit a padding. The second time the side screw at the front motor mount came off, but this time it hit a square steel pole
Long story short, the only part that need replacing was the spur gear and the motor, as both the motor case and rotor have deformed.
But the car still good as new, chassis is still flat and no broken part, even the motor mount is still straight.
So now I have used slightly longer screws with thread lock.
Cheers