Update:
I've worked a little more on the bow.
The wood feels similar to osage (maybe a bit harder and as "brittle")
Unfortunately the bow developed a huge hinge, so I had to tiller it down more. I came to a draw weight of maybe 45# which was much lower than I wanted.
At this time the bow was 68". I decided to shorten it to 64" and was very surprised how much weight it gained from that.
So far, the tiller looks promising. There are still about 1 1/2" reflex left.
More to come. And pics too.
Radon