One thing of note is G26's do NOT like to be lugged. They NEED to be real close to 10,000 in order to make the power they were designed for. Some of the conversion engines will happily twist a prop at 7500 but the Zenoah is a different animal and really needs to turn up to get to it's full potential. I know when Ralph gets through with one it will turn an 18X6 pretty close to 10,000.