If using contact cement you can apply a layer of the adhesive to the last inch of the wrap end (or both ends if need be) and let it dry. When you go to apply cement again it will not completely re-activate the layer of cement on the backside of the wrap. This will allow you to position or press the wrap level or a half thousanth below the wrap channel. This method is only for when you are a thousanth or two off. Learned this from Paul Dayton more than 10 years ago (Thanks Paul!).