I am finally diving into the main spars. The kit plans have us install nutplates for the fuel tank skin and access panel attachment points, and then countersink the screw holes to fit the dimpled skins/panels. They call for using a #30 or #40 pilot countersink, which will center well enough in the nutplate to get the job done.
My question is this: Why can?t I use my larger-pilot countersink to countersink the screw holes before I put in the nutplates? I think that they would center better and give a cleaner countersink. Is there a reason against this?
My question is this: Why can?t I use my larger-pilot countersink to countersink the screw holes before I put in the nutplates? I think that they would center better and give a cleaner countersink. Is there a reason against this?