thanks for the replies guys!
The servo is ok and return's every time and it s fine if I don't get back on the power, but as soon as I give it even the slightest throttle before the car has straightened and it just wants to keep turning or over rotating. Once car has some speed the handling is great. even off power is great. fast corners are ok too.
It's only when I slow the car down for tighter corners that I have this problem.
When it happens, it's a blinding quick and super tight spin out.

Like I said, I actually built a whole new car with new parts and the motor is the only thing carried through which is why I had a harder look at it and found the bent rotor.
Was just wanting to know if this would be a cause, or am I missing something?