Hi alex7403
I have read everything you wrote but I cannot understand what problem you are haviing making a knife edge. If you could better describe what the plane does when you go into knife edge, myself or others may be able to give you suggestions. Just saying it falls off, or something like that, is not enough for me to understand the problem. You seem to be much more advance than I am, but I do knife edges all the time, with every plane I have, even a Canard of my own design and build. The knife edge manuever can tell you a lot about the balance of the plane, and a few other things. So it's up to you; give a more precise description.