I put a .40 equivelant brushless motor set up on a foamie that weighed 20 oz, it had a 14" prop to boot lmao. It tended to break props upon landing since you could only belly land the thing and it always came in hard, but what a blast to fly. Overkilling your power system in meager levels such as what you are doing merely means they will be a bit heavier and you have to mess with the COG a bit, in my case, the motor weighed a lot more then the rest of the plane itself, so just kind of flew it like a rocket, needless to say, the winds no matter how insane they were, were never an issue at all, it didn't even flinch at them.