DC –
For a specific draw weight, the limb width is dependent on the draw length, working limb length, and the SG of the wood (0.82 for Osage). Your design bow lengths (assuming 8in. for handle and fades) should allow 40@26 with the “rough-out” width of 1in. I’ve made several in the 45lb. range with these dimensions – so you will probably end up around 7/8in. wide.
H