So one of the Hobbywing ESCs is defective and will need replacing. It only runs for a few seconds then dies. The fact that only the defective one has a distinct high pitch whine when powerd was a clue.The other issue is that the reverse mode is less power and thus spins slower per pulse. Maybe this can be compensated for in software, but I'm not sure the rate is proportional. Would be a bummer to have scrap these and go with more expensive ones.