Okay...it's installed.
Thanks to everyone who has posted.
I'll toss some pix later. For now? Well, for now I'll ***** about running the line to the rear camera.
I've replaced about a dozen headliners in my life. Half of them on Volkswagens. (<- If you haven't done that (VW), well, nothing else compares.)
I ran the line for the rear camera along the front driver's headliner to the A-pillar, routed it behind the curtain airbag (closer to the roof/door than the airbag). The little sticky clips (included in the 750 kit) were useful to keep the line from falling. Upon arriving at the C pillar...the frustration kicked in. I could NOT get the line above the headliner over the rear window. The headliner curves into the roof, hard. Plus, the rear window frame cuts down on space.
I pushed a lot of line up into it and reached in from the (removed) center brake light hole. There's a double metal structure, the brake light assembly holes are small, and my hands are large.
It took me SEVERAL HOURS... I created a workaround solution.
I've got most things on the camera sorted. Now, I've just got to figure out how to get it to use non-metric measurements.
More later. Some pix. I stopped documenting sometime after the third curse session (plus the sweat running into my eyes and my sliced fingers would've made any pictures pretty lousy).