Pulled out a pair of rawhide backings I got from Mike Yancey some time ago. 38" each, sweet. Roughed the shiny surface off the bow back, cut the backing strip to size and soaked in water, made up some hide glue from gelatin, sized the bow back and hide strip and applied then wrapped with string to hold it down. Seemed to work well, having enough glue let's you easily squeeze out air bubbles and extra glue. Also helps greatly if the hide isn't larger than the back.