Stephen,
The cab is open back. The box is 10 inches wide (front to back) with the face set back 1" to protect the knobs. I planed the maple down to 5/8" thickness. The chassis just fits in the box (with about 1/8" clearance side to side, and the larger transformer has about 3/4" clearance in height. I fixed two 10-32 nuts into the chassis mount holes (with epoxy) so when I slide the chassis into the box, the two machine screws you see in the front engage the nuts and hold it in place. The face panel is some curly maple veneer I glued onto a piece of 1/4" Baltic birch, which is glued into a slot in the top and sides of the box.
I was going to put a metal screen on the back, and make an extension for the speaker jack but the owner said he will just be carefull. The tubes sit far enough in the box that you would have to be careless in order to hit them anyhow.
I already delivered the amp today, so I cant take any more pics right now... but the good news is I got my own Deluxe back
Another 2 guys were in the shop when I was there, and Luc (the guy I built this one for) was trying his out. Again, they were really impressed and I told them to come and see the Trinity website.. hopefully there will be a few more of these up in the North some time in the future..
AJC