[stum]

Gee the motor is working regardless if your slippers are giving or not... so the performance differences lie with your ability to get the torque to the ground w/o spinning out & keeping control while achieving a higher speed through the track. I would think anyone using the motor brake would want a very high center diff to avoid all brake power going to the front typically causing less control. If you have mechanical brakes I've found the stock 10k center is really great, but if your setup is braking via the motor I personally wouldn’t do anything less than 50k and just work your way up to the 500k if necessary. Keep in mind the Traxxas setup is different with the transmission as well as it using motor brakes, so the 500k is necessary; the 8ights are direct drive off the center diff and often have mechanical brakes still.. but not always.