Doc, I've been pleased with the limited osage toasting I've done. I think there is a positive effect when used. How much? I have only how it feels to me for comparison so how much performance is hard to judge. I like the method enough to keep using it. As of yet, I haven't toasted a bow as much as Marc St Louis does. I'm working my way up that way but slowly. I don't think osage needs as much toasting as the whitewoods do but a little werks well for me. You can incorperate it into your straightening and bending sessions.