My "go to" bow right now is a Hackberry I made over the summer. I'm pretty amazed by the wood after building a few with it. My opinion, 2" is fine, carry that out to at least midlimb. Taper the last 10 inches or so for the tips. Heat treat once you begin floor tillering and then again as you scrape that away. I don't know what your stave length is, but 62" is as short as I would go for a stiff handle, 28" draw, 50ish lbs. 64-66" is better. Good luck, I'll look for the finished product!