Grunt, does that BL sappling bow have a back of sapwood? It looks similar to one I made a while back. Mine didn't last, but I think it was my fault for going too narrow with it.
CP
The Black Locust sapling bow is all sapwood. I think I had four nice fat rings. I didn't crown the back and it seems to be holding up pretty good. I heat treated the tips when I flipped them.