Completed step 2 page 06-07 riveting the main skin to the skeleton. Completed step 3 riveting the remaining open holes in the lower end of the V-stab rear spar. Completed step 4 – screwed the VS-1204 fwd skin to nutplates in main skin at front vertical spar assembly. Completed step 5 – bolted upper hinge assembly to V-stab assembly and torqued the AN3-5A fasteners to 25 inch pounds.