Completed drilling all the gussets to final hole size. Disassembled and deburred all the aft ribs and gussets. Straightened 3 aft ribs and riveted the gussets to these. Many more ribs to debur and straighten. (Hand-hammered ribs don't start out with the flanges bent a full 90 degrees, and when using the hand seamer to get this angle, they are no longer flat, so the flutes need to be pulled in with the fluting pliers.) Later, returned for another hour of deburring the aft rib gussets and riveted these in place.
