Great, informative picture. It confirms what I saw at disassembly and what makes sense. I had no screws in my car's tray, although you can tell the quarter cover was installed with screws in place, as it is wallowed out a bit. The original 'spacer' or standoff was masonite; I duplicated in lexan cause the originals were broken. I can see why they are there, to keep the cover panel from compressing in. The spacers bear upon the subframe of the c pillar.
The spacers have to penetrate the headliner, or either the headliner is worked around them. I just need to understand how to do that without mucking up the headliner install. I don't know if the 1/4 panel covers were installed before or after the headliner, I ordered an interior assembly manual - maybe it will explain. The Graham assembly manual, which I have, doesn't address the detail;actually only addresses deluxe interior fitment. At any rate, the headliner is in and the covers are not...
I like the idea of abandoning the standoff and just locking down the top of the panel with the screw. I am going to pursue that idea. Very very good thank you.!
K
ps looked again at the picture, that is some awesome work. I hope I can do half as good