This is in the basement of the new house. You can see both wings in their jigs. By doing both wings together like this, you get the opportunity to make the same mistakes on both wings rather than different mistakes...
This picture does a reasonable job showing the wing structure. There is a heavy main spar very visible -- it has all the building stuff sitting on it like a hsell. You can see all the ribs. The outboard skins are in place, but I've removed the inboard skins while doing some inspections. The rear spar is nearly invisible, but if you look closely, you can see it at the tail end of the ribs. You can see the ends are clamped to the 2x4s near the bottom of the picture.
The jig itself consists of a pair of 4x4 posts mounted floor to ceiling. You can't tell from the picture, but the 4x4s are attached to the floor -- I used a Reamington power nailer through the pieces of plywood visible. I'll use a cutoff wheel when it's time to take them down.
If I were going to do it again, I would take a hint from some of the other builders and make my jigs from plywood. Just build a box out of the plywood, I guess, or maybe a sandwich. The advantage to this method is that you can get perfectly straight plywood, where it's very difficult to find even close-to-straight 4x4s. And even if they start straight, then don't tend to stay that way.
This isn't a real problem, as you true up your wing using levels, and assume that your jig isn't even close to straight and will be flexing with time.
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