On 2/10 cleaned and etched the left wing skin and ribs for proseal adhesion. On 2/11 constructed the internal structure, inserted into the skin and riveted the tank while attached to the left wing for proper fit and twist. Will be waiting to add the top flange until after proseal cures so can do leak testing on current work. For Rib 7 on leading edge had to file down an inside notch on rib and shorted the 3.2x8mm rivet to allow enough clearance to pull the rivet as the rib was exactly blocking the hole on the skin.