will my digital servo burn out my esc?
you will be fine without it. most people are running their T-REX without a BEC and are running a 9650. make sure your using a 401 gyro. they are the most widely used gyro on the rex and it has a digital servo setting which is esential for using the 9650.
I imagine i can just reverse all the servo directions in the TX but thought it was wierd.
try it. if all the servos are moving in the wrong direction then yes you should reverse and recenter all the servos. that should fix it.