Rotated a couple of the pics that I deleted from the other post, to make it easier to see what's going on. Also added stabilizers to both sets of steps.
The TV slide setup turned out pretty close to perfect, in terms of what I set out to accomplish. I stopped at home depot on the way home today and bought a 2' x 4' piece of birch and a can of spray paint for about $27. I believe their 24" full extension drawer slides were $17, but I already had some I salvaged from work. I had them cut a 6" x 24" piece and a 25" x 24" piece. I cut the L out of the 25" piece. If you can imagine, the vertical part of the L is 25" tall by 12" wide, and the horizontal leg is 7" tall x 24" wide, and the measurements include the portion where they would overlap. I used the L to allow as much access as possible to the access panel and central vac area, and the 25" height comes from the measurement from basement floor to underside of bedroom floor framing. You could very well leave the piece of wood be 24" wide x 25" tall . I mounted the drawer slides to the L first and held them about 3/4" to 1" from the top and bottom of the 7" tall horizontal leg. When I attached the 6" x 24" piece that holds the mount, I kept the top of it even with the top of the 7" tall horizontal leg of the L. I just made sure that I aligned the fronts of the drawer slides with the leading edge of their respective pieces of wood. I then mounted the assembly in the basement, making sure to hold it forward enough that everything would clear the rear strut on the baggage door when articulating the TV into the baggage compartment while still mounted. Hopefully that's clear as mud, but if anyone has questions, fire away. I'm sure someone can help me point out details I may have missed.
LINK TO MY MODS
2012 F350 King Ranch DRW 6.7L
2013 Sabre 36QBOK-7 Platinum Package