A fun project we just started that when done will allow us to carry four gallons of gas plus a Hi-Lift jack on the back of our FJ using the existing spare tire carrier mounting location on the rear door.
Full-scale test mockup built out of 2x4s to better understand how the design would fit in the FJ available space. Some things are great, some not so great.
Our v2 attempt at getting both the pivoting cot extension and sliding desk to work. If the FJ was shaped like a RAM ProMaster, this might have worked.