Hey Nate!
Excellent report again! I love reading these, so please, continue. They are very well written and compiled.
I love high end machines, the 2800 would be a nice find up here in Canada. most TOL machine I found from GE was the Medallion 850. Which just so happens to shave A LOT of the same features as your 2800.
The Medallion 850 also has the Multi-Orbit wash arm, large Calrod element, Super Racks, and the same star-gear shaped detergent dispenser actuator.
I found with the 850 that LARGE debris would slide through the pump screen, and into the pump. The genius of having a large centrifugal pump, is that debris are quickly rejected/in-and-out of the pump. They don't hang around, and because the impeller is huge compared to other makes, there is a lot of space, so plastic wrap or any loose debris do not get stuck to it. The large vanes in the impeller mean a number of damaging things can slide through it, like that chicken bone!
I have to admire the GE pump set up, it is a really good pump, can handle a lot of water. And can handle a lot of debris, snots, crap, and anything else the water is carrying. The above paragraph basically explains why the "filter screen" has such large openings compared to a KA, Maytag, WP, or other DW sump screens.
If I remember correctly, the Mutli-Orbits wash arm takes 3-4 complete rotations before it comes back to its original path. What I did was open up the door, take the bottom rack out, and then spin the spray arm until I could get it to where it was closest to one side. As I rotated it, it got farther and farther away from the side before starting to make its way back to minimal clearance from that side.
Great report!