I clecoed the fore and aft tip ribs in place. I fluted the forward rib so it followed the curve of the upper wing skin. I then clecoed them and riveted them in place. I then turned the wing over so I can work on the bottom of the wing tip.
I used one of our work benches to lay out the bottom close out skin tab angles. I used business card to cut the various reference angles and fabricated a bending tool as shown on the drawings. I then proceeded to bend the tabs to the appropriate angles using the reference cards to make certain the angles were correct. It all went very well.
I clecoed the bottom closeout skin to the wing top. All of the holes lined up just right and the skin fit like it was supposed to. I am now ready to rivet the close out skin in place along with the trailing edge close out piece.