Dimpled rest of holes closest to trailing edge using pop-rivet puller and dimple die set. Fluted and straightened 603 & 604 ribs, then drilled them together w/#30 bit. Trimmed flange corners of 604 rib where spar will overlay onto rib. Scotchbrited reinforcement plates and then finish-drilled them to spar. Used hand-seamer and bent forward flange of 609 rib to align w/spar and skin rivet line.
