Started back-riveting the right elevator this morning. Took about an hour to complete. I didn't read far enough forward in the plans to note that I need to drill/deburr/dimple/prime the elevator trim doubler in the left elevator. Took about an 1:15 to get all that done and next session I will back-rivet the doubler and all the stiffners to the left elevator.
Rivet taped in place in preparation for back-riveting
Back riveting stiffners to the right elevator -notice the gloves and thick clothes - 28F OAT