The only thing I could ad would be this....if it's going into a Gee Bee of any kind, go light on the front end, they love to nose over. I am getting a BME fo my project, only cause a buddy is selling it and I know the history. If I got a new engine, it would be a DA, only because the designed and built it from the ground up for airplanes. Others are modified from the lawn world. Nothing wrong with that, just that thay have a little extra weight. All are good reliable engines.