| I've been in contact with the maker of the board, who said to return the board and offered to replace it free of charge or repair the item.
I think it was a faulty transistor as it was working fine and the motors even when stalled will only pull up to about an amp or so.
The component was really alight though and it took a fair amount of blowing to get the fire out! Luckily I was only testing in a trial chassis, saying that though it would have looked quite spectacular with flames licking out the vents on the engine covers!
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