Clecoed the Lower Skins (F-1281) to the 3 Frames and the Bottom Skins. I had to bend the J-Stiffeners slightly to allow the Lower Skins to seat better onto the Bottom Skins. After being satisfied with the fit, disassembled the Lower Skins, deburred/sanded sharp edges and "broke" the edges. Will rivet the skins after priming.