Right Wing Skins On

It's been six months since my previous post.  Apologies to friends and family hoping to see steady progress being made.  'Twas summertime in Sacramento you know and usually too warm to hang out in the garage.  At last the days are getting shorter and the Delta breeze has been kicking in making it tolerable to do work in the aircraft factory so I've been riveting on wing skins for an hour here and there the past few weeks.  It's been tedious and there's nothing particularly blog-worthy about that so all I have for now is a few pics of the final result.

First the bottom skins go on (the ones that wrap around the nose), but most of the top-side rivets are left open.  Then the flaperon attach brackets go on (through slots in the bottom skins), then the top skins go on, and then you finish up by lapping the bottom skin over the front of the top skin and adding the wing-walk doubler skin at the wing root.  To the right is a picture of a flaperon attach bracket.


All the Vans wing skins have ⅛-inch rivet holes pre-punched at the factory and generally no deburring was required.  In the next picture I'm finishing up the process of lapping the bottom skin over the top skin and fastening with clecos:

Can you see the last rivet in this picture?

No?  How about now:

Bonus points if someone can tell me what the rivet hole is for, since it's not on a wing rib and doesn't connect the skin to anything underneath.

Of course it would look prettier without all the blue plastic on, but for now I like having it to protect the aluminum skins from scratches.