Today I continued on with riveting the right bottom inboard skin. I finished up the 4th rib, then did the rear spar in the 4th and 5th bays. Finishing up the 4th rib before starting the rear spar in the 4th bay was premature, as it made it difficult to get the skin raised enough to reach the rear spar. From now on I will follow the directions in the manual and go no further than half way down a rib before starting the rear spar in the next bay.
Also, after just a few rivets down the 4th rib I rotated the wing down to almost horizontal (photo 1). I think this orientation will get me through the rest of this skin.
Rivets Today: 31 Rivets Total: 7998 (If I'd known that, I would have set two more, just because...)