Thanks for your reply John. I'm not designing a plane. What I am doing however is taking parts and putting together a plane. I have an old Solo Star wing that I have put onto a duraplane fuse. I have already made the adjustments to the fuse to accept the wing. This wing is much bigger than the wing that the duraplane fuse had. I also moved the landing gear forward to make it a tail dragger. I just want to be sure the CG is correct. It may not be a good flier when I'm done anyway, but I would like to be sure its stable CG wise.