There is no reason for this model to weigh 10 lbs unless you really like epoxy glue and over building. That said mine of about 20 years ago had an OS90FSR and my flying buddy had an ASP90 on his. Both were superb flyers and weighed just a few oz over 8 lbs. They didn't lack for power to do any of the conventional maneuvers. Since the real one never hovered or had oos capability overpowering it is pointless. It's meant to be flown and enjoyed. If you want to hover get a heli. if you want unlimited vertical then get into rocketry.