I riveted the rear spar to the left wing skeleton. Everything went pretty uneventful. I used the flush rivets in the end outboard rib. The rivets are set well, but the rib has a very slight distortion. It's perfectly fine as the material is tight around the rivet, but the outside edge of the rib flange wants to site just proud of the rear spar.
I primed the flush rivets as the aileron hinge will eventually sit tight against it.
I can see why the instructions tell you to place the manufactured head on the thin material specifically for riveting the ribs to the spars. Of course I made sure that all manufactured heads where placed on the thinnest material. The end outboard rib is the only instance where you cannot do that.
It is important to double check the rivet callouts. I find that the Vans callout's tend to be off by 1/2 size. I'm sure that they are just fine for use, but I chose to set all according to the rivet gauge.
Every rivet was set extremely well, just had to drill out and replace one rivet. Sweet!
