Clamped 3 "L" qngles to the pilot side side skin. Drilled and clecoed. Trimed the ends. Positioned two longerons on top side of pilot side side skin. Drilled and clecoed.Marked rear length of the pilot side bottom skin longeron. Un-clecoed and positioned it to attach to the bottom of the pilot side side skin. Drilled and clecoed.Clamped 3 "L" angles to the passanger side sideskin. Drilled and clecoed. Trimed the ends.