First off, thank you. I appreciate when people answer questions rather than go off into semantic banter avoiding said question.
A 1,200lb payload is honestly impressive, but I'm not convinced 63hp can move 1125kg very effectively.
Something as simple as 80-100hp would make this truck heaps better imo.
Granted it may be great at hauling dirty messes that aren't heavy or large through small areas, adding 20hp wouldn't make it any less effective there.
It would however, make it more effective up hills or mountains, or for someone in the slightest bit of a hurry.