ER tank bungs

Today I installed the bungs for the extended range tanks I plan to add at some point. They were easy enough- first, I drilled six holes in the flanges of the bungs. Then I located the fuel feed hole in the outboard ribs then drilled and deburred them. Next I match drilled the bung to the ribs and deburred those holes. My next step was to vaccum all of the shavings out of the tanks. Lastly, I mixed up some proseal and spread it on the bungs, then blind riveted them in place and capped them temporarily with the provided plug.