Riveted the forward spar tunnel in tonight. First riveted the top clips in, which hold the tunnel to the fuselage sides. Then the fun begins with the inside flush rivets. This was actually not hard, just awkward. I had to use the bent stem/wedge technique to do the upper two and lower inside on each side, otherwise it was very straightforward. I then riveted the stiffener clip to the tunnel near the center (you can see it in pic 3).
