The F-776 bottom skin needs to be deburred from the match drilling and dimpled. Dimpling after the surface is primed usually results in the primer cracking. So I need to wipe these dimples clean with acetone and give a coat of primer to clean them up.
I struggled a bit with trying to figure out when to rivet the ribs to the bottom skin. The plans don't say and according to the different build logs I reference...So do it now, some do it later. I'm a tad concerned at the accessibility of driving the -4 rivets in the side skins at this location in the future, so I'll hold off riveting them for now.
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