I'm building a set of wings for a -6 and was wondering if anyone out there has installed access holes in the bottom skin. My plan was to cut 4-5" holes in each bay of the lower skin, install dimpled round doublers, and install cover plates dimpled with #6 screws. I don't think it would significantly reduce the strength and would allow access for riveting the top skin as well as inspecting the spar/ribs later. I would do this on the panels aft of the spar. Your thoughts.....