Marked position for the access panel reinforcing plate and the cover plate. After drilling the rib flange for #8 screws, I clecoed the reinforcing plate in place and drilled #30 for the platenuts, then deburred and attached the plate and platenuts to the rib. I then moved to the fuel filler flange, marking the position, then clamping and drilling. I did the same thing for the fuel drain on the lower skin. Finally, I fabricated two anti-rotate brackets for the fuel pickup tubes and called it a night. Lot's of prep work, not a lot of obvious progress! The next step will be to dimple the skin, then on to sealing the tank.