Don't get me wrong on the two stroke, they can't be beat, sport, pattern and those screamers they use in pylon. For 3D a 4 stroke is a must for me. They do get some good results with some of the higher RPM models with pipe, but we have a decible limit at our field and those things do whine. I like Saito, YS is king, comes pumped,but I hear you on the fuel. Joe