Completed dimpling of Left Elevator parts. Riveted tip ribs and counterbalance skin together. Installed SB625-8 snap bushing to front spar and riveted K1000-6 nutpates and reinforcment plates to front spar. Riveted E-905 Root Rib and Elevator horn to front spar. Riveted K1100-06 nutplates to E-615 Reinforcment plate and riveted E-615 to E-1001B Left Elevator Skin. Started back riveting E-1008 Rib halves to E-1001B Skin.