I don't think you should try a real crooked stave for your first osage bow. I can take the stave to a growth ring if you're worried about that step, no problem. You just tell me where you want the stave/bow to be and I'll go that far. You'll have to let me know what you have to trade.
Osage is nearly impossible to rip once it's seasoned. I had some green osage milled with a portable sawmill, it was costly. I had 5 boards cut, I think it cost me $70. I owe Cameroo some board staves from that wood. It did check some so I'm not getting as many board staves as I hoped I would. Here's what getting osage milled looks like.
I guess next time I'll try spraying the boards with shellac to see if it stops the checking. The boards looks like this now.
Yes, we should probably go to email.
George