I used little Tinnerman clip nuts around the perimeter of those panels - I believe they were included in the kit. I used some slightly different ones on the rear 4 holes. Then I used some "Tric-nuts" on the steel tabs that are welded to the fuselage. It would have been just as good to use the clip nuts there too. So, those little SS screws have a replaceable "nut" to screw into. I can post some pictures showing how everything went together for me if it would be helpful, Carl.