@GGG posted:John, I do not think chuff with not working tach, rather it was idle chuffs. Was the 5V set ups and they added the 10K resistor in the tach orange return line. G
Ah yes, I remember that now. I was looking for it in my notes and couldn't find it. I guess I'm back to something amiss in the drivetrain where the motor drive isn't getting to the wheels.