Installed earlier this summer. Used 1/2" and 3/4" maple prefinished plywood, rabetted (dadoed) glued and screwed. Finished panels are just MDF with solid edging and veneer epoxied (vacuum bagged) inside and out. There is an entire sub carcass with a bottom torsion box. My biggest concern truthfully was the wall framing which was suspect. Hadn't sprayed the bottom trim when these photos were taken.
I have the detailed design but the forum won't allow me to upload.
Ok ... figured it out (converted to jpg) ... note the original design called for legs, but the architect preferred without legs and it is certainly sturdy enough (wall question included) to stand on its own.