i wasnt there when a failure occurred so not sure how it happened. Probably because wire spool is taped to keep it from birdnesting while bouncing around in a rig and tape wasnt removed. i do stock extra variable speed controllers now, and i think i got 5amp ones instead of 3A originally. could also just delete the wire speed option, my original setup was like that running wire feed on 12v, weld circuit on 24 for years and worked fine for 1/8-3/8 duty with a skilled operator.
VA fix went awesome, toyota truck ripped out a drain plug and only solution was to weld it since threads and plug were damaged.