Today, I continued match-drilling the left auxillary tank. It's a lot of holes to drill, especially that some of them must be drilled from the inside out. The rivet lines are coming out much straighter on the left auxillary tank. Must be all the practice I received on the right. Also, the two extra holes in the right auxillary tank that were drilled due to interference between the pre-punched holes and the newly drilled ones, were resolved and are absent from the left aux tank. The OCD side of me wants to completely redo the right aux tank, to get straighter rivet lines, but my wife talked me out of it. :)