Now finished with making the Stiffeners. While preparing the Top and Bottom Aileron Skins, I botched TWO dimples in one of the A902 Bottom Aileron Skins. I ordered a new one from Vans... I shouldn't work when I'm tired. The remaining three Aileron Skins were finished and primed. The Stiffeners were Back-Riveted onto the skins. Shop Clean-Up.