Linger,
No its never to late to change stuff. We will take that into consideration.
Syndrome, yes these motors are developed by Hacker Brushless motors.
www.hacker-motor.com
As far as sensored and sensorless goes, I have used both multipule times.
Sensored is definatly the way to go if you wreck more then once.
With sensorless ,when at low speeds the esc pulses the motor trying to figure out where the rotor is making the car very hard to drive.