It was meant to be a bow, the owner wants it to be made a bow, the original bowyer gave it to the owner with the expectation for it to become a bow. If you feel up to it, and what I have seen, your work to date, shows you as a master bowyer. Go for it if you want to.
In the eyes of history, you will be making history. I still think it should be painstakingly documented through video, pictures, and even a log book or journal. And its history will still be forever preserved. JMHO. God speed and may the force be with you.