Drilled aileron brace to wing and spar. Deburred all holes; polished most edges on ScotchBrite wheel, sanded all others with 600-grit paper. Rolled edges. Dimpled edge of brace that will attach to skin. Cleaned and primed brace. Primed inside of skin around brace attach holes. Began riveting aileron brace to spar. Clecoed flap brace to spar.

I noticed that the pre-punched hole in the rib did not match where the flap brace hole actually is. (Photo 3)