The first step involves preparing the main spars by riveting on a large number of nut plates to accept the fuel tank skins and inspection panels. There is also a large amount of precision countersinks to be made.
I got a large amount of the work on the right spar done.
Nut plates temporarily attached with clecos. (I quickly found that the clecos had to go on the underside of the flange to fit the pneumatic squeezer in there.)
The large countersinks will accept the tank skins dimpled for #8 screws. I took my time with these.
All flange nut plates riveted on to right spar:
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