I have a Rattle Snake skin I want to put on my next Osage Self Bow. How much excess do you leave hanging off the side of the limbs if any, and how do you trim it off, with a razor blade? And how do you keep the glue from running down over the side and how do you keep from digging into the side of the limb with the razor blade? Or do you trim it off after the glue sets up a bit and then wrap it tight? Rookie snake skinner here:)