The countersinking continues: 4.9 hours

I got all the nut plates installed on the left wing spar and also installed the 1/4" nut plates that are part of the wing mount.

I started countersinking for the fuel tank screws on the left spar.

 

Both main spars on the bench!

 

Working on the right spar:

 

The joys of countersinking:

 

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