Since the last update I’ve been able to final drill all horizontal stabilizer holes common to the skins and the ribs/spars. Disassemble the whole thing, and deburr all the holes. Then dimple all the holes and machine countersink the spars and stringers. I really need a 3-4 hour window to prep, let dry, and spray primer; so I’ll wait until the weekend for that.
Some pics of the HS progress.
So while I wait for a weekend day to prep and prime these parts, I decided to start on Section 9, the Elevators.