Installed bottom skin on left wing:
Finished drilled, dimpled, and cleaned wing prior to riveting.
Cleco'd skin to wing and taped back for access to begin riveting.
Riveted skin to wing with pneumatic rivet gun and bucking bars. Taped rivet groups in place to preserve finish of aluminum.
Installed Pitot Tube mast to main wing spar and used screws to assemble to wing skin.