Wing: Left wing skeleton complete

Note that the grommet on the inboard-most rib was initially put in backwards.  It was obvious later when I did the wiring.

I did end up putting the extra rivets in that I found while doing this walkthrough.

Here we see two rear ribs which apparently did not get washed well after etching.  I was unsure how much acid corrosion had or will happen in the future,  so I ordered replacements over the winter and finally installed them when I began work again in May 2018.