I did not have a one way bearing on my spur. When I removed the engine the spur ran freely both ways. The test run went bad quickly as my steering servo crapped out, stripped I think, as soon as I started running. Im using the brake and reverse function built into the esc. The 2s lipo did the trick though and the light show from the back of the motor can was cool. I will replace the servo today and run again while taking motor temps as I may have too small of a pinion gear in the heavy car with the 17t. Ill post up some pics tonight as well.