I guess on thing I didn't make clear in my explanations of the pictures, is that the plexi doesn't attach to the canopy at all. The end with holes of the flat plexi screw down to the panel above the bezel on the rear body of the cab. The end of the angled plexi screws to the seat portion behind the marquee above the speakers. The other ends of the plexis meet in the middle on the crossbar. They aren't held down by screws, but rather by the metal bracket that screws to the crossbar.
Just more pictures I need to take to show how that happens.
By the way, the angled metal bracket on the front of the seat. Not sure how that attaches, as there are no obvious screws holding it in place from the outside.
Since I've got a 3-day weekend coming up, I can find some time to get over there and take some more detail pics. Shouldn't take as much time since I don't have to do hardly any disassembly for what I still need to do. Supposed to do some work on it next week, so I'll be taking off the bezel and CP to access the monitor, and should be able to get some pics of that.