In the interim, I contacted a very nice and helpful EAA Tech Counselor (thanks, Joe F.!!), and brought him a representative example of my work (left elevator) as well as samples of the way that I'm currently dimpling and riveting, since they have changed slightly (see past posts). Fortunately, I can say that my current dimpling and riveting techniques are on-par. My earlier dimpling was a little shallow, likely due to dimpling with the vinyl still on the skins (I stopped that practice with the aft fuselage section, and now dimple with all vinyl removed). Moreover, the overly cloudy look to the skins/rivets banged with the mushroom set might just have been schmutz accumulated on the polished head, which wasn't so polished anymore. Joe used a Scotchbrite pad to clean the mushroom head surface, and it looks and rivets better. Moreover, the Scotchbrite could remove the "cloudy" surface on the skins, revealing rivets and dimples that were just fine. Phew - Build on! Below are a few steps completed over the past ~week:
Attached the vertical stabilizer to the aft fuselage assembly with AN3 bolts and temporary nuts, to #12 match-drill two holes:
Another view - looking even more like a real airplane!
Back-riveted top rib, top j-channel and skin doubler to the top skin:
inside view:
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