Ok fellas, I've got a real small glitch. So small I doubt it would matter in offroad, but I'm running carpet oval now. Using an M8, older airtronics rx, monster stock pro motor, older tekin speedo. When I hit the throttle the wheels turn ever so slightly back and forth. Barely, but enough to make it wander. No breaks in wires, clean comm ran twice never cut, antennae not touching chassis anywhere.
I remember reading a tip somewhere that you could file down the width of the brush and something to do with how it goes over the grooves in the comm that that would make it not as glitch prone. Thought that was a specific motor though. I know, try my good rx in there. Just wondered any thoughts. Got a new quantum 2 on it's way back from the fix it guys.