Apollo wrote: We now return to our regularly scheduled beating. Oh no you don't... speaking for myself and assuming the (un-invited) responsibility to speak for one or two others here with some experience... we are NOT trying to beat down or beat up or beat sideways. There's a guy here who is trying to actually take an internet discussion thread, wrestle it out of cyberspace and into the real physical world. Remember the great music video for that Norwegian band A-HA, "Take on me", where the girl is trying to rescue the imaginary race car driver from the pages of a comic book and get him into reality? This is the aviation version of that. What nerobro is attempting to do is a very honorable and difficult goal. I for one want him to succeed, whether I agree with his design details or not. A decent, safe airplane that would allow a lower cost entry into air racing is a good thing. What I am trying to do, and what I believe at least one or two other reasonably educated people are trying to do, is to somewhat steer the process towards a final product that has a chance of achieving the purpose. For my part, having been through this from the race pilot and team owner perspective, I have a pretty good idea of what race organizers, FAA race inspectors, and race pilots are going to want and need. When it comes to running detailed structural calculations, I can't add much... but I believe there are people here who have that knowledge and experience. So please don't think that I'm beating on anyone. I won't do any of that unless someone is suggesting something really unreasonable that is going to put lives at risk. nerobro, please forgive me if anything I've said here sounds or feels like it is mean-spirited, pejorative, or even rude. Absolutely positively not intended. I will stand by anything I've said, or apologize if I have a change of heart, but this is sincerely intended to be constructive and supportive. Anything sounding like "criticism" is only because there's something that I think I know that you don't, or that you are under-prioritizing.