I think it's too small a diameter for a bow, from my experience a sasafrass bow should be made of heartwood, like an osage bow. I would get a bigger stave and chase it down to one growth ring of heartwood for the bow back. The one sasafrass bow I made with sapwood for a back snapped in tension, it looked like the sapwood just didn't stretch enough, I may be wrong but these are my observations. I would like to try another sasafrass bow sometime, it is a relativly soft wood and easy to work when straight grained. There is a lot of sasafrass on our family farm, but straight trees are hard to find, also they don't get very big.