Very nice work, I think Im going to copy most of your setup.
I just ripped my apart to start over (forth time in 2 years). I basically had a RB30 setup, but with a futon mattress, which is my preference to sleep on.
But I have been pondering a setup similar to yours and the RB50.
Any change you bought your carpet online? if so where?
And, do you have any squeaking or crackling issues? I had a ton of them when I attached the cabinets to the walls, and it was due to the flex of the van.
Many thanks and wicked sweet ride.