Use a metric ruler to measure the distance between the holes for the staples before drilling them in the innner fender. A digital caliper would be even better. That distance has got to be really accurate or your staples will just not fit.
Having a helper available is a good idea. They can hold the inner fender over blocks of wood while you drill the holes. The needed holes around the curved back side are a supreme PITA.
I found that using 2 sets of needle nosed pliers are best for closing the staples. Having the helper hold the BACK side of the staple in position while you close the ends would probably be a good idea. The problem is that the staple wants to slide one way or the other while you are trying to close it.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
