My wings came to me in twelve totes and bundles, without blueprints. This means sometimes I get fairly far along before realizing that there's a little piece that should go right there. In this case, I finally got all the main ribs and noseribs on my right wing, and started fitting compression struts when J of Call to Wings lifted up a primed part and said "Where do these go?"
In her hand she held two trailing edge ribs. Which, in the year I've had this project, I've obviously sanded free of corrosion and primed, but then forgotten about. Where do they go? There are two different styles, too, so am I looking for another set for another wing? This sounds fairly simple to look at the photos of wing prior to disassembly and see - but it turns out that since the aileron cove was nailed to the rear spar with plenty of supports, it's really hard to tell trailing edge rib from cove support.
Today, after much scrutinizing of the old spars at lunch, I suddenly understood - it's the nail holes that tell the story in varnish. There's only one trailing edge rib, which only nails to one side of the spar! The reason the second trailing edge rib doesn't look the same is because it was cut from a full rib, and never fully modified - the second piece of metal for nailing to the spar removed, a third of the remaining piece that gets nailed to the spar cut and flattened to fit under the strut support!
Tomorrow, I shall modify the second trailing edge rib - because it's better to modify it now than to wait until the first is nailed to the wing and not able to easily examine!