Brief Description: Stiffeners on the other skin are riveted in place.
Just like before. Drop in a whole bunch of rivets, tape them down, flip it over, put the stiffeners over the rivets, then go at it with the gun. Oops! I did have a problem with a few rivets that didn't go in nice, they stuck up a little "proud" on the factory head. Drilled out the rivets and tried again - good fit the second time.
Rivets in, tape stuck.
Oops! Riveter edge hit that one. Drill out, remove and do again.