Gut, I have another clean ERC stave set aside that I plan on backing with sinew.  I wanted to see if I could keep this one together. That remains to be seen as I need to shoot it in.  It has been drawn to 27 inches over 100 times in my tillering tree though.  Fyi, I use the tillering stick for photos and to run my gizmo along it but I do all the exercising on my tillering tree.