Temp cleco fuel tank supports in top skin for left wing. Fit skin to leading edge. Numerous adjustments to clecos. Finally clecoed entire wing. Skin then fit very well to leading edge joggle. Dave M and Ron L helped pull skin down while I match drilled spar with #30 drill. Clecoed every hole in leading edge. Tested scrap leading edge piece for proper countersink depth and dimpling of skin to prep for final dimpling and countersinking.