Pilot drill doubler on rear spar (6W7-2 & 6W7-3).Mark rib locations on Rear spar.Pilot drill wing locker covers for ribs 4 &5.Locate & pilot drill "L" supports for wing locker rear wall.Cut 45 deg. end of rear spar (@ wing tip)Drill 1 1/2" hole in rear spar for aileron control rod exit.
