Will do. The 4.5 inch pad I bought will be too big to keep it there long term but is designed to be a sleeper sofa mattress so it will fold a little at least. This is my very not to scale poor drawing of the back. The dotted line is with seats back. I’m going to tape together some large paper and create a template. I’ve got an electric carving knife that is supposedly the best for cutting foam. I’ll see if I just want to fold the mattress cover under or take it to a local seamstress.Your setup looks awesome!
Could you take pics and take notes along the way? Very interested to see how this turns out. I think I recall a redditor doing a setup like this but attaching it to the cargo area and the backs of the rear seats so when the seats were folded down the bed was always available!