Back to the fuelt tanks. The left one first. I edged the skin, and deburred the inside and outside of the screw retaining holes and the holes for the leading edge splice plate. I then dimpled these holes. I countersank the skin holes for the skin/rear baffle. I also deburred the ribs rivet holes, the rivet holes for the fuel cap, and the holes for the tank strenghteners. Now I need to dismantle this tank so I can finish deburing the interior of the holes and the interior ribs