Ive just recently started making my first bow. Ive got the stave cut out and the bow tillered. It is 72 inches and pulls about 60lbs. I am not going to leave it as a selfbow, I want to back it to make it more durable, pluse add some spring to it. The bow is white oak, im thinking of backing it with either hickory or bambo. I believe bambo would be the best. What do you with more expericence think?