Slo-V Flyer

Well you are right, however, without proper gearing and or Kv rating, a motor does not automatically draw less amps when fed more volts. As you know, generally the motor will run hotter (due to more amp draw) when run on higher voltage than lower voltage. So in order to run the low kv motor efficiently, you do need to gear it low and or at the correct ratio so it will not pull too many amps.

But anyway that was just a point I wanted to bring up. Go up in voltage, go DOWN in kv rating and probably go down on pinion size (or larger spur gear), to stay more efficient.