That's one you don't see very often. Magnificent work!
I live in the area formerly inhabited by the original builders of these bows, the Tuku deka (also known as the Sheepeaters or Mountain Shoshoni). They were fascinating people with extremely advanced technology for a stone-age culture. The Tukudeka seem to have largely relied on traps and stealth for extremely short range shots. How do these bows shoot? Are they effective at longer ranges? I've heard they are very, very fast.
There is an excellent book about the Tukudeka called "Mountain Spirit" by Lawrence L Loendorf. I'm guessing you've already read it.
If not, you should try to find a copy.
Anyway. Your work is stunning. Well done.