Alright.....I'll be good from now on. Or I'll try.
Your CAD looks a lot like what I've been trying to accomplish. I have been somewhat lax in my attention to the build for almost a year now (actually, it'll be a year tomorrow since I last touched a tool to it).
Here's a pic. It's going to be skinned with 1/4 ply, insulation will be done in an Elvis style black naugahyde over foam with buttons. These will fit inside the "cavities" of the skeleton, more than likely using velcro to attach.
My back will be a little different than what you have pictured. I've got planned a work surface that will slide into the tear, exposing storage in the ass end. The work surface will be able to pull out of the tear a foot or so also, giving more surface are for cooking etc. Confusing to try to explain, I'll see if I can Photoshop up something, or mock it up in the actual skeleton.