I have been getting way too much practice taking the wings off and putting them back on the center section. When I first built up the center section, I misunderstood the manual and only installed the four ribs that rivet to the seat pan. I mistakenly left off the ribs at C1, C2, C7 and C8. this did seem to make the center section rigid enough to remove it from the wings. So I did that to turn it over and rivet on the bottom, and moved on to other things. As I though about it, I realized that those missing four ribs needed to be installed now, and just to be sure the wings would still fit, I had to reassemble the wings onto the center section before I installed the last four ribs. I now have all eight center section ribs installed, and the wings do still fit. Taking them off and putting them back on is a real pain. I made up a tapered pin from brass rod and that helps some.
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