look in engine conversions in the engine forum for a ryobi conversion by COMBATPILOT. He is a good flyin' buddy of mine and is rather good at the mechanical stuff.Tthese type of conversions take a little work but are not very expensive...well this is RC you can spend as much as you got! He has reduced the weight significantly. I watched him take of all the excess aluminum one one with a die grinder, didn't take very long!