RE: WHAT Motor To put ??????????????????
well, the real question is how much does it weigh? the specs for the gas one says 2.2 lbs. Most of that would be for the motor, fuel tank, and support/reinforcement for gas power and weight. If you are willing to spring for (or if you already have) a brushless/lithium system, I would say it could fly quite well, its not all that different than the GWS flying pizza or ladybug, probably just a bit heavier.