I measured my spine to head and came up w/about 36".  I like the idea of a 1 pc 40" bow quick and easy to string.  No takedown to put together.  Drawing about 20-22 inches, 40-45#,  Osage D bow, sinew backed w/ skins to waterproof.  Possibly Black Locust in the same dimensions (Just happen to have a good dry piece).  Do you think this is possible?