Riveted the bottom side of the HS today. After a few rivets, and switching to bucking with my right hand, I finally got the hang of it. The shop heads were coming out flat with just the right amount of squeeze. At this point, I am checking every rivet until I'm sure of my work.
Bottom side flush rivets.
Some smudge marks from the swivel set, but not that bad.
Bottom side of HS riveted, except for outer edges.