I have been in the industry since 1979 and this one has me scratching my head. I have been able to staple into gelcoated fiberglass seats with my regular air gun using stainless staples over the yearsbut it won't seem to work on this one. It is a Cobalt 262 and several of the seats are gel coated fiberglass instead of plastic or wood. I am using the regular 22 gauge wire staples that I always use. Years ago I had a Duofast gun that used much bigger staples but it is long gone. Any help would be appreciated.