I tested with the zack rogers setup yesterday. Have the exact setup, I could not get the rear to stop swinging around. What are the electronics on the car? Mine are shorty to motor and esc behind servo. I tried white fronts as well. This with 8.5 motor and dirt webs sauced golds for indoor clay. The b5ms can put down the power super easy.
Also thinking of going RM on my second car to test back to back.