Dvshunter, I tend to agree with Knawbone and D. In that if you are comfortable with it, go for it. But, I would document every thing done with the stave with video and pictures.
With all due respect, I don't think its anything like Mr. Brownings gun. His gun was a finished, working gun. With that said, no I would not modify it in any way, shape, or form.
This stave, however, is not done, for whatever reason. I don't think any bowyer, woodworker, craftsman of any kind starts something with the intent for it not to be finished. So, if you're ok with it, go for it. Think of it as you being a co-writer of a song. Your just finishing what was given a great start.