Dimple left leading edge skin and cleco entire assembly together prior to riveting. Back riveted the J channel to the skin which was out of order according to plans but this is a much easier way to get to the rivets in the J channel. It all clecoed together without any issue so I think this method works fine. Assembled the tank attach skin nutplates and access hatch doubler nutplate.
Dimple the leading edge skin
Back rivet J channel before assembly - works fine but different order than plans*
