Your implementation is much fancier than mine. Ours you pull the porta-potty out to use. We tested ours on a 5 day outing and there was no odor. My wife made a tray that snaps on the front half of the top for traveling to have a place to toss stuff, still room to sit on the back edge if we need an extra seat. It has holsters in the front corners for our water bottles. The whole thing is easy to remove, I have a slide in hold down on the front and a latch on the sides. I plan to add a swivel base to the passenger seat so it will have to be pulled back into the kitchen while seat is being turned then slide back in place.

