This was just a brief session to start installing some of the larger rivets that hold the Horizontal Stabilizer rear spar together. On each end of the HS there were 3 solid round-head rivets that needed to be installed with my hand squeezer. Then along each of the internal ribs, 3 more blind rivets needed to be installed using the hand rivet puller. Finally, along the two inner edges of both sides of the HS there were 3 more solid round-head rivets that needed to be squeezed. What's next? Start squeezing all of the flush rivets that hold the skin to the rear spar.