Inverted fuselage and level. Install left and right undercarraige. Drillout and bolt on main axle brackets to main spar. Set up and install left aft axle bulkhead assembly. Trim, drill to 1/8" and cleco with angles on each side. Form top angle to be flush with ribs. Fit pivot housing to aft bulkhead.
Rough in flap control rods and place motors. Trim off flap motor bracket and place on to mounting assembly. Fit on inner and outer guide bushes.
Place one stiffner into place in starboard upper skin.
