More work on the fuel tanks, like match-drilling the right tank, preparing and priming the left tank and prime the mating surfaces.
I put the tank on the wing with clecos and match-drilled the holes.
A very handy tip from Peter V. is to use a 4.1 mm file in the drill and run it counter clockwise instead of a drill or reamer:
Next I edge rolled, prepared and primed the left tank:
And I primed the mating surfaces on the wing with 2K epoxy primer: