Originally Posted by cdwilliams1

Appreciate the ideas! I'll have to tear her down again tonight and see if something is binding. Near as I could tell, it still runs clean and quiet. I'll hold it up in the air and see if the front wheels turn on their own tnite.

Someone else suggested in a PM to check the BEC voltage to make sure the servo is recentering. For VTA locally, we run 1s lipos on a 17.5 motor (apparently since both are cheaper and more plentiful to buy used), so it could indeed be a problem with not enough servo voltage to keep it tracking straight. When the power is off from the motor the steering servo gets the juice.

Thanks again though. Lots of things to try!