First off you need to dial in your new stapler. Hold the trigger and you will see the blade that pushes in the staple protrudes past the nose of stapler. Hold down the trigger of stapler and use one of your small grinders and grind the blade of the stapler even with the nose piece and it will not cut thru the vinyl. the extra material goes around the front of the top to finish off the edge. Usually sewing around a piece of windlace cord. Can be stapled around a piece of rubber hose as in fuel line or vacuum hose.