Continued on 9-18left elevator build. Clecoed and riveted the rear spar assy with ribs to the top skin. Shimed as required for a straight build. Continued on 9-19. Backriveted all the E-1008A ribs to the bottom skin. Went very well. Clecoed and riveted E-01411 trim reinforcement doubler and assy to the bottom skin . Took both top and bottom skins with rib assy's and clecoed together for riveting.