Sounds like a great modification. I wished that you could purchase the PF without the 3rd row seats. Only way was to buy the base model. Maybe Nissan will take note for next years model for us guys that don't need the 3rd row. I dont know about that i've never seen one without a 3rd row and i have ...
I've been thinking about this also can't wait to see what you come up with! If i go this route it will have to be level with the floor since i sleep back there while camping. Take lots of pictures if you can.
I had mine up there for awhile, but didn't care for the look and you could tell it was up there when turning. Thats what started my swing out tire carrier.