Continued drilling leading edge skin to spar and ribs. Completed drilling upper side, then did the tuck in on the bottom side. Had to do this 3 times - first time, I had the tie-down bolt in place, and the extra-long lower skin (from vacuum bending) interferes with the bolt. Second time, skin got caught on #9 rib and tucked under (another result of the extra long lower skin). Third time got it in place, added the pull-down boards, and tightened the 4 cinch straps. Drilled lower skin to spar to lock in non-twist of the wing. Then went back and drilled the upper side of the forward and aft root ribs to the skin. Then pulled out the root ribs and laid on the root doubler. Drilled it to the skin from the inside out using the right angle drill. Completed drilling the upper side of the doubler to pilot size, and the lower forward part of the doubler to pilot size. Next will be to drill the upper doubler to final size, then flip the wing over and complete drilling the leading edge skin to the ribs and spar.
