Originally Posted by Randy_Pike

On the 4PX there are a few settings that should be changed:

70/30 from 50/50 default PRIOR to calibrating the ESC.

Turn off ANY ABS

Turn off the BLS mode. This may require a software udpate and should be done on the ESC channel which is #2.

Calibrating the ESC to the radio should be fine after this. To verify you're getting a full brake signal to the ESC simply hit brakes and watch all the LED's climb the tree and then flash.