Tom, I've built a few osage ELBs in the 45# to 60# range, all from staves and not billets. With the spliced billets you want to maintain a rigid handle. Start at about 1 1/4" at the handle and out 4" either side of the 4" handle, then taper to 1/2" tips. With a rounded belly you have to take care not to get sideways bending. Good luck and post pics as you go along.