I'm with Jeremy on this. I have an all osage lams, glass, r/d longbow. It was my first custom bow ever. It's a beauty, shoots hard, not quick, and not the smoothest drawing.
Yes it is tough and forgiving wood! That's why I don't think it works good with glass. It can do just find all by itself. That's why I love my osage selfbows!
If for looks, go with a veneer of osage, and use a core of red elm, boo, or even sassafrass. It does probably better in a recurve, because of wider, thinner lams, but in a deep core, narrow limbed bow, I wouldn't. Good shootin, Steve