I would Like you to Look @ Video of Electric Self Rotating Wing & Tell me what you Think? Only 2nd Time Out with it! Low Batteries Never Charged & Shorted Out ounce When a Friend Soldered Battery Plug on Wrong! Also Cooked Red Brick 80 amp. ESC! Collar slid on Main Shaft 1st time Out Dimpled Shaft for Set screw Now Very Slight Neg. But,Over riding servo Wanted it for Autorotation! I Think I can Adjust it Out? I also Took Off What weighed as Much as a Baseball Bats worth of Oak Axes,3' 3/16 Steel Round Stock, 4 3" Mag wheels with Rubber tires about 4 lbs. Total? Using Aluminum Tri Pod Set up. See How it Works on You Tube Video is Very Impressive for 2nd Time Out & Never a Charge on Either Battery Charger went NG! Can't afford another Right Now! Had IMAX Clone I Think that Stopped Working! I Think It's Going to Catch On Very Fast! My Corvette of Copters!