Very good motor. Very powerful even at 7.4V. I bought two of them but probably I'll buy others for friends. Please keep in mind the Tamiya connector are 15Amp max and this motor can reach 21.5Amp. If you dare stay too much in auto mode they can melt generating short circuit. With all the related consequences. So switch to Deans-T connector in all the system! Then, If you use CNC hop-up with LEDs the single shot in SEMI-AUTO mode will not start the LED. Will work just the auto mode losing the first shot. The chip of the hop-up unit is calibrated for slower motors. Till 15'000/20'000rpm. Is useless switch to lower voltage battery for decrease the speed or use slower gears 100:300 or 32:1 ratio. It still remain too fast.
Very good motor, improves ROF for AEGs, recommend this seller, will by for further. Fast shipment.