Started by clearing the work table. Laid two longerons on the table and laid the left aft fuselage skin on top to locate pilot holes. Drilled all pilot holes in Left Upper and lower longerons.Realized F27-03 L&R have not been made. Stopped to rough out F27-03 L&R and quit for the day.Aft Cross Tie box assembly was made and Clecoed with silver clecoes. Ready to rivet on sidelVery productive day.Thanks Eric.