[What's_nitro?]

Hey aalzuhair remember way back when you posted the setting of your controllers? I noticed that you had free-wheel disabled. I've skimmed through the thread and I haven't seen anyone mention it so I thought I would point that out. If you noticed cogging on deceleration but not acceleration, that is why. The controller brakes very hard as it tries to regulate the speed or the motor. If you were driving at high speed and decelerated enough to engage the "speed brake" the controller may have been overloaded by the sheer number of braking voltage spikes sent back from the motor. Having a slotted stator helps to couple the magnetic field of the rotor into the stator windings and can produce a very powerful current spike. In a nutshell, if you accelerate to a speed in 3s, and then brake to a stop in 1s, the controller sees 3 times as much current during braking as it did accelerating. This could have caused both of your controllers to blow.