Another nice bow, Pat!
A year and a half ago I started on an osage selfbow that had several huge "warts" like that one. (My wife called it "Two Tits", don't ask me why.) While final tillering, and shooting-in the bow split a few inches long below the top nock. I filled it with super glue and wrapped artificial sinew around the split but stopped working on it.
It was so pretty I was afraid it would completely split, or break. I should probably finish it... Maybe this summer.