Dimpled right tank ribs, drilled vent hole in right inboard rib. Deburred edges of drilled holes. Prepped left tank skin for proseal, strategically placing painters tape around stiffener locations, fuel cap and the fuel drain perimeters. This will help keep proseal off places it shouldn't go. Also, bought some syringes, and cut off the tips of them so I can suck up the right amount of the proseal mixture to mix up. It's supposed to get here Friday, so I'll try to hit the stiffeners this weekend.