69 Avion, thanks for that info. I decided against a trailer after all and have built a cradle of 4x6s to hold the camper, which I will place on that frame tomorrow.
Regarding the aluminum chassis, I have now a plan to replace all the plywood/foam sandwich panels - really all the plywood in the camper - with 1" thin wall square tubing welded up to a template for each panel. Then I'll attach a 1/8th fiberglass sheet to the bottom side, fill the space within the aluminum frame with foam-in-place closed cell foam, and attach another piece of 1/8" fiberglass sheet to the top. I plan to take each plywood/foam sandwich out a panel at a time and replace it with the aluminum/glass panel. I concluded that detaching the shell from the chassis was unnecessarily complicated. This replacement of the panels one at a time is, I think, pretty straightforward. We shall see...
I have a 6' Quicksilver tent trailer, made by Livin Lite. It uses 1' thin wall square tubing and Azdel panels. No wood anywhere. The floor is 5.75" x 3/4" aluminum planks that fit together in a tongue and groove fashion. I believe I will use those planks for the floor. The manufacturer in Indiana can supply them. This will provide rigidity and complete weatherproofness.
Still considering how to fasten the panels in the camper. I'm thinking a combination of construction adhesive along the outside curved edge with rivets and/or screws. I think mechanical fasteners are a better idea than welding the frames together, but perhaps some welding will be appropriate.
I'll post pics as I get to interesting points. Currently my C11 looks like every other stripped-out project camper.
By the way, I have what I believe are speaker wires coming out of the walls, one at the front and back of each side of the overhead cabinets. Three are single wires and one is a double wire. Is there a way that Avion was able to rig speakers with just one wire??
This forum is such a great resource!
Dick