Finished countersinking tank skin.
Drilled skin/spar screw holes to #19.
Removed brackets and baffle.
Drilled and countersunk brackets for platenuts. Puzzled over how best to drill the platenut mounting holes. The #8 platenut jig is almost sufficient, but the #19 post is just too much smaller than 3/16 to get an accurate centering. Then I remembered how it worked for the left tank - use one of the 3/16 bolts, thread a nutplate on to it, align, clamp, and drill one of the #40s. Cleco, and drill the other #40. Presto! Instant nutplate drilling jig. Repeat 17 more times.
