Not seen in any pictures are me final drilling and dimpling the wing skins where the the tips attach to the wings.
Then there is using the nutplates clecoed in place on the top sides to match drill the rivet holes. I use a drillbit in the first hole when drilling the secont hole to make sure that it will fit. This is followed by countersinking the rivet holes using a cordless screw driver. Then final drilling for the screws followed by countersinking these holes. Then I place the nutplates holding them in place with a screw while riveting using the always fantastic squeezer.