Thanks for your offer to help Jonh. I think what im going to do is use the old CG of the wing which is 3 3/4 from LE. I will attempt it and see how she handles. If it turns out to be unstable I will post what you need to get a CG for the overall plane. My main goal is to slow this dura plane down with this wing. I want to help a friend learn to fly, but I dont want to risk my Corsair.