My hat is off to you for your persistence! I would have given up long ago...that said, you are in the best place for advice. Knowledge here is plentiful, as is the will to help. So, ask away. And, if you can, buy, borrow or steal the first volume of the TBB series. It deals with wood structure, tillering, and most of the things that a novice finds puzzling in building wood bows. I know, I'm there too! I wish you the best of luck with your efforts. After so many bows, you more than deserve it!
DF