I think Alltrax needs to get their poop in a pile. In their manual they want a 1amp diode but in the schematic in tiny print they ask for a 3amp (both about a dime but they sell for 100 times that
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As far as their other suppression circuit that should be on their shoulders if they charge $500 for their product. Either fix the problem in the controller or give the 6 dollar part away with every sale. According to them they’ve sold over 3 million, why are they expecting a non employee on a hobby forum to be doing their job of informing past and current buyers. Shameful.