All I want for Christmas is two gas tanks with no leaks ;-)
Today I final drilled holes, deburred holes, dimpled holes, rechecked flanges for 90°, deburred and polished flanges, deburred the large holes in the ribs and smoothed the edges around the nose of the ribs. I think I'm done prepping the gas tank ribs for both tanks.
I spent the rest of the day cutting and finishing skin stiffeners for the tank. The provided channel sections had holes drilled to locate the angles and edges. I taped all the channels together and cut the individual pieces to length. Then I build a couple jigs to help cut the angles accurately and quickly. After cutting on the band saw, I sanded the edges on the belt sander to final shape and then polished all the edges on the grinder with the scotch bright wheel.