Layed the location for the comm antenna this morning and fabricated a doubler. I match drilled the doubler to the antenna attach hardware and BNC connector hole. I then used the doubler to match drill the bottom of the airplane. I then deburred all the holes. Drilled the nutplate attach holes in the doubler. Deburred those holes. Dimpled the screw holes and then it was time to get to work.
Comm antenna mounted on the right side aft of the spar.