Pat-
The stave is an all heartwood stave. I was going to leave it with a sapwood back, but I just couldn't chase a sapwood ring without violation. So I got it down to a complete heartwood ring. It was much easier to see and chase that. I know with a sinew backing it isn't really necessary to have a complete back, but I figured this would give it the best chance for survival. I guess that isn't always the case
. Hopefully the fix will work, if not I'll try again.