I actually don't have any answers for you, but I'm interested to watch for whomever chimes in. I'm doing the exact same thing right now - it's actually my very first osage bow. I just landed my first osage staves this month and in my post-splitting process I ended up with a 36-40'' piece that I roughed out for a bow for my 4-yr old. The bending thing is my next step because the wood was (according to my cheap moisture meter) about 21% when I roughed it out and dropped to 16.5 in a couple of days. What started out straight is now twisted kinda funky. I have read about both dry and steam heat for osage, but was considering steam for my first real bending try. I've read some opinions that it's a little harder to screw up so long as you use a metal covering on the limbs while you're bending them (splinter prevention).