Horizontal stabilizer priming, dimpling and spar riveting

In parallel with the work on the rudder and vertical stabilizer, I've been slowly making progress on the horizontal stabilizer. After the skins were primed, I dimpled them, primed the spars, and finally started assembling the spars:

Horizontal stabilizer spars

I guess the only challenging part was to interpret and follow this riveting diagram:

(not really that bad, but you do end up checking it twice before setting each rivet)

The next steps are to start assembling the ribs/spars/stringers together, but most of those haven't been primed yet.

Time lapse:

Total horizontal stabilizer time: 83.5h
Total horizontal stabilizer rivets: 178