If osage has been dried with the bark on it can be a pretty good chore removing the bark and sapwood. One little trick I have learned and it works well on character staves with a lot of knots as well is to make up several little splitting wedges about the size of broadheads but about 1/4" thick, easy to mkae on a grinder out of mild steel. Anyway just clean up the sides of the stave with a draw knife or bansaw so you can clearly see the growth rings. Pick out a ring one or two rings above the one you want and tap a wedge into it. Go all the way down the stave with the wedges and if needed put a few wedges in the same ring on the other side, try to pound the wedge into the springwood if you can, it will often just pop right off leaving you a ring that just needs a few minutes worth of scraping. Doesn't work on all wood but most osage is pretty good about this. Steve