I just used the cloth wrap like I use on rawhide or snake skin backings, Art. It's behind me now. Rawhide back coming tomorrow after I get a new bottle of TBII or TBIII. I think she will be at least 50# without the sinew backing. The rawhide is only because I toothed the back and being thin ringed osage I feel safer with a rawhide backing. She may yet get her chance at an elk. If Elkie is happy, we are all happy! d;^).