Well I recently just finished with the finishing touches on my C/10 set the rockers on mine and tightened down the allen's on it and hopefully I won't have to mess with them for a while now. Runs great with the 4 speed, but I have a bad vibration around 50mph, so I have to check the pinion angle and check the angle. it is deffinetly a mph issue, so maybe the clutch (which i need to adjust).