Thank you joe. I did not solder it to the mamba to troubleshoot. I did it just to see how what the motor was like, ie. how powerful etc. But if the motor is in fact killing off the esc, wouldn't it have done the same to the mamba? Or maybe, maybe not? BTW, mamba is up to date on firmware. Also as far as I know, the motor screws are not too long, the motor turns freely and the recommended size is like a mm or 2 longer than the screws I'm using.