I have some confusion as to why the rivets in the picture below (lower left in red oval) aren't to be installed now? Any time I see "DO NOT RIVET YET", I try to find out: 1) why 2) when they are to be riveted.
In the case below, I can't find where the plans tell you when to install these rivets. If I'm reading the plans correctly, after the foam ribs are glued in, there's no way to get the "special bucking bar" on them. In reviewing various web pages, I don't see where anybody has had an issue with this so it's got to be something I'm missing. So for those of us who learn slowly and retain little:
1) Why are we to wait?
2) When do we install them?