My 10 minute camper conversion
Obviously doesn't include the several hours of design, construction, and finishing the 12 components...
This dropbox link
has my "blueprints" and video (one sped up with campsite set-up pics added at the end. the other video slower speed sans campsite pics).
Not shown (and I will add a pic to the dropbox next week) is how I fasten the system at the two metal attachment points at the rear cargo door to prevent forward sliding in case of a hard braking event.
Install takes 5-10 minutes from stowing the 2nd and 3rd row seats to being ready for gear.
I'm 6' tall and can sit cross legged on top of the 6" mattress and still have an inch or two headroom clearance. The mattress is a FULL size Millard Tri-fold (4.5" foam + 1.5" memory foam) and it is unbelievably comfortable for two adults. I indicated it as a TWIN in the video but it is a FULL which I had to trim to a 48" width.
We like the set-up and will be spending six or so weeks touring this beautiful country next May.