Howdy CoalMiner,
Welcome to the addiction of bending wood.
Yes, what DanaM said.
Tillering a bow correctly is challenging.
Learning to tiller a bow correctly is much more challenging. And tillering a recurve correctly is more difficult than tillering any kind of straight bow.
I have about ten bows in various stages of completion. (Meaning, I've tillered about ten straight bows.) And, I have been watching guys build all sorts of bows on this forum for a long while now. I still don't think I could properly tiller a recurve.
I'm sure you have a very nice stave there. You'd be treating it well by setting it aside with intent on learning on a few other staves (or boards) before you procede on this one. Remember, you can learn to recurve on some less expensive (less valuable) hardwoods than that osage.
What ever you decide, go slowly, and ask a lot of questions. (And post pictures!!
)
Good Luck,
Canoe