I'm building a 1/5th scale S.E.5a (Dynaflite). It calls for a .90 to 1.20 4-stroke. I want to use a gas engine, but the smallest and lightest I can find is a Zenoah G-26 at just over 3.5 pounds. Is there a reliable gas engine that is closer to .90 size in power and weight? I want scale performance - sound - look. I'm afraid the G-26 is too much power and weight.