To install the rear inside cat whiskers on a 69 B-Body hardtop, Is everyone using the heavy duty staples, like the original ones? Does it take a special tool to install these? I'm not coming up with any method other than to drill through the new cat whiskers where the staples should go and peening the staples over on the back of the metal door panel. I don' t have a tool to apply such a heavy duty staple. Am I making this harder than it is.