I didn't read through all the posts, and maybe someone already mentioned this, but I recommend to anyone who is building a biplane to go out and get a copy of Harry Higleys book called BIPES. My first two biplanes barely flew for @&$%, then I got this and every bipe since then has maidened with only a click or two of trim (if that.) if you plan to build one, I STRONGLY recommend it. You can even apply a lot of it to mono wing planes as well.just my opinion. Steve.