[sm=confused.gif] Has anyone tried to convert an enginefrom these guys http://www.davesmotors.com ? I sent an email to them but it wasn't very informative as their expertise is in RC Cars and not airplanes. They give me the impression that the CY engines kind of mimic Zenoahs, or sort of. If that is the case, the shaft taper should be able to take a Zenoah prop hub, maybe? Does anyone know? I am wondering because the engines are reasonably priced and they offer porting in some of the engines that they sell, and that would be awsome to have a little engine with a little more pep (reserve power) than your regular stock airplane engine![sm=cool.gif]