I riveted the ribs to the rear spar.
You are supposed to install the rivets with the manufactured head against the thinnest material. In this case, that’s the rib. I installed the rivets in the correct orientation, but I though the outcome was sloppy. I drilled out the rivets and installed new rivets with the manufactured head against the spar. 
I started working on the wing stand.
I broke one of my clamps…
