Using a hole locator and the reference lines and marks on the bottom of the W-804-2-R and W-704-L Wing Lower Inboard Skins, Drilled #30 the screw hole locations in the left and right center bottom skins. RV-8 Only: Make the left and right F-863-1 Tank Attach Brackets
Centered the F-863-1 Tank Attach Brackets on the two open holes in the forward side skins, then clamped them in place on the T-405 Angles on the fuel tanks.
Match-drilled #12 the two holes in the fuselage into the tank attach brackets.
Marked, then drilled 1/4, the bolt hole which is common to the two parts.