I've been saying for a long time that hoverbatics and 3D are all about three things, Weight, Throttle Response, and prop. I too ran the gammet of carbs and settings. I use the 11x4 wood on my 40~45's most of the time. I'll always prefer wood over anything else, although I've had good luck with the Master Airscrew 11x4 too and use it alot. It gives just the right amount of slippage under most conditions. Have fun_bob