Clecoed E-607PP Trim Tab Spar to the inside bottom surface of E-619-1-020 Trim Tab Skin. Clamped E-718 to E-717 Trim Tab Elevator Horns. Ran a clevis pin through its attachment hole for alignment. Clecoed the E-717 outboard horn to the trim tab skin. Match-drilled E-718 to E-619-1-020 Trim Tab skin and E-607PP Trim Tab Spar.