I say that it only happens in reverse because in forward, I have never had the issue unless I am trying to go full speed and put the joystick full forward. The reverse thing happens during non-WOT (so to speak) as well as WOT.
I can try a 12V bulb but it runs ~36V soooo maybe I shall try a 36V bulb?
I have voltmeters, clamp-on DC ammeters, etc etc which I'm sure can help further
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