the 1512 is just fine for a buggy. my medusa 60mm motor is smaller than that and it has no problem pushing my 10lb CEN matrix. there is no reason a 1512 wouldn't work, unless the buggy is geared for over 50mph.
They say a good mechanic only needs 2 tools - WD40 & Duct tape. If it moves, and its not supposed to, duct tape. If it doesn't move, and its supposed to, WD40.
Gotcha, will keep an eye on the MMM for now, the motor was fine never heated up. Will get a couple replacement fans to make sure when the MMM fan goes for real I will have something to replace it with.