Just a few minutes in the workshop tonight. I squeezed the rivets on the VA-146 hinge bearing which is sitting between the two HS-411 brackets. Van's calls for -5 rivets, and adds with an exclamation mark that this is the correct length. Well, those rivets do look too short, but I measured the shop heads after squeezing, and sure enough they are within MIL-specs (min. height .050" and min. diameter .163" for 1/8" rivets).
I will spend some more time this evening figuring out what to order with my wing kit. I want to save shipping, so I asked on VAF what other people typically needed for their wings.