As promised, some pictures.
Here's the "finished" install. The Xenarc fits nicely in a single-DIN adapter console I bought from Crutchfield - trivial to install using the DIN sleeve that came with the screen (except that I had already connected all the wires and had to disconnect them to slide the screen in from the front of the console). It connects to the console adapter using two L5 screws - I had to get these from the local hardware store, since the metric screws that came with the Xenarc were too short. Note that the length of the screws is important - too long, and they'll impact the PCB inside the sealed display unit (bad).
The pocket over the Xenarc is part of the aftermarket console; the one below is the original Ridgeline pocket that usually attaches to the stock radio brackets. Notice that the hazard switch is integrated into the pocket assembly - this would be a pain to build a bezel for, so I'm just as happy to use the original pocket.
I think I would have preferred to have the Xenarc in the top position in the adapter console, but that doesn't work - they're slightly different heights.
All in all, it's stable in here and the aftermarket look isn't bad.