Laid out hole pattern on the 404 rib flange. Getting edge distance is more accurate by drilling from the 404 rib thru the 702 into the 405 rib. Clamped 404/405 ribs in skin, marked holes. Removed and fluted. Clamped them in again and drilled the 602 spar to the 405 flange end. Removed, cleaned up chips and reinstalled. Used a long clamp to pull the 702 spar and 405 rib tightly to 602 spar. Drilled skin to 405 rib starting at the 602 spar and working toward the 702 spar.
