Removed upper doublers/gussets in order to file-down the front edges of the longerons, since both were keeping the wing attach bracket from fitting flush to the fuselage. This was a lot of trial and error on and off work.
Riveted the wing attach bracket to the fwd vertical supports. Had to use a 3/16" reamer to get the large (A6) rivets into the holes. Again, a lot of "coaxing."
Riveted the fwd vertical supports to the fuselage side skins.
Riveted the upper doubler/gussets to the front crossmember and to the upper skin and longerons.