Since the days when I was making 2 pound BLDC Motor/planetary Gear box drives inside a snug 2" diameter submersable housings used as solar powered boats outboars motors inside the 10" 15 hp gas propeller hub.The small 1.5 Kw motor with gears obviously didn't get even warm but it did loose some efficiency in the process and learnd then both for cost,range or power spectrum and efficiency it is better to go with the smallest size with the most power that is the most efficient with the least moving parts starting from high torque at a at low efficient rpm to get the least possible reduction ratio using a "single Chain reduction "to achieve the torque you need.It all can be done with auto $8. pre wound auto stators and off the shelf parts cheap! cheaper in volume.I But anyway LOL@lowell the bittom line is you get what you can and they will last untill they quit and still make smiles. Thats where its at! tin can motors make $ and I wonder why there is not a GREAT! product yet.? I think I have had the answer a long time. LOL=@Lowell