Well, she's finally finished. I put on the casters on the bottom as it stands. I would have attached them to the back but I couldn't have reached the far two to install them. In retrospect I would have attached the casters before attaching the last two panels.
The Duratex isn't as durable as I had hoped. Maybe I didn't apply it correctly? I would have thought three full coats would have been good.

It's taken quite a bit of scratching and gouging already, but part of this is because I used Arauco not BB. The next cabinets I take gigging often will be BB, and Line-X'd.
The difference with and without mouth braces is
huge. I had attached the casters but not the mouth braces yet and took it for a test run. At low power there was noticeable buzzing, and at war volume the rattling was annoyingly loud over the bass. After mouth braces were installed and PL cured I fired it up again. Low power no buzzing at all, and at war volume minimal buzzing. With it standing on the floor the casters don't buzz anyway.
Onto the pics! The Duratex was dirty and dusty, and the second makes it look awful but it's just the flash severely highlighting the various imperfections in the wood and paint job.
In person it looks good and almost professional, and the red mouth looks evil.
I know, I haven't painted over the PL used to install the mouth braces. I'll do that sometime later, but now that it's corner loaded in my room that might take awhile to get done.
BTW, the corner protectors are awesome. You need them on any gigging cab. The corners of my cab would have been utterly destroyed by now from loading in and out of the car, etc, had I not put these corner protectors on. They are the large Chevron corners from Leland.