Began deburing left flap Began priming the control horn. Began to countersink the bottom of the flap skin before I realized my mistake. I need to dimple the bottom skin and counter sink the spar. My bad... Went online and ordered a left botton flap skin, $27... wonder what shipping will be... ech!! Anyway I continued to counter sink the spar. Riveted the control bracket and end rib together.
