well some brands of pla are probably as strong as resin, so you could just print the gears :-) https://www.youtube.com/watch?v=UtRJ4lnNAXY&t=116s Dependign on what you want to use the gears for. Also bear in mind angus did not try polycarbonate, nylon with carbon fibre or rigid polyurethane (ninjatek armadillo). Although with out a hi-temp hotend and enclosed build volume, then you won't be able to us epolycarbonate either.