Drilled, deburred VHF Comm 1 antenna doubler at Sta. 5 top. Drilled skin and fit antenna. Riveted left side skin at Sta. 11. Needed .020 spacer. Fabricated lower and mid longeron stiffeners. Clecoed lower and mid longerons at every hole Sta 3 to Sta. 4. Install of Com antenna at this point, with right side skin not yet riveted gave good access.