The walls of the sink cabinet are just 1/4" luan. They are pinched in the channels of the 80-20, was a little tricky to assemble but doesn't use any fasteners to hold the panels on.
The doors are just two pieces, one slides in the front channel of the 80-20 and one slides in the rear channel. Works well and the doors are easy to flex slightly and remove entirely if totally access is required.
Im using a foot pump to draw the water from one 7 gallon relience tank and using the other for gray water. This allows me to dump my gray water easily whener permitted, and swap out fresh tanks with one ill carry on the rear bumper I'm designing.
Ive got a 12v water pump in my parts pile but have always hated the noise they make while constantly cycling on and off. This design also bypasses the need for an on/off faucet and conserves water. A big carryover from camping out of my truck was that I really wanted to be able to brush my teeth and wash my face inside. Cooking can be done outside, but I hated having to go outside to use water.
Toilet is a (too) small model, named Vagabond. Simple and easy, and the wife is happy just knowing that if she does have to go in the middle of the night she doesn't have to get out.
The lid had gotten a little scratched so i decided to freshen it up
A bungee hooked onto the 80-20 rounds out the cabinet for now. The toilet has to be pulled out manually but I've got slides for it