SO...apparently I was working so hard to get this thing done before I left for Yellowstone that I didn't even take progress pictures.
For those interested in boring build details:
All the exterior aluminum skin was adhered to the steel frame with Sikaflex 252. The top and bottom sheets of the box were scrap .125 aluminum I picked on craigslist. I got all the diamond plate as scrap for $40, and the trailer didn't even use all of the sheets I got in the bundle.
The tan box is bolted to the black frame with six 3/8 bolts. I built the frame to the exact specs of the 1/4 ton military jeep trailers so if I wanted to put one of those tubs on the frame I could.
The hardest part was ensuring all doors were square and had adeqaute clearance around the perimeter of the door openings. All doors were aligned and all holes for hinges and latches were drilled prior to painting. I don't like the idea of screws holding hardware on so all of the door hinges use stainless bolts that go all the way through the tubular steel frame. I hand drilled everything and killed many drill bits in the process.
The hinges came from a marine supplier on craigslist, about 6-8 bucks a piece. The latches are pop-up style, sealed to keep out the dust.
I'll get some more detalied pictures when I'm back home. The door seals are a pinch on molding. I welded an 1/8th inch thick lip around all the door openings for the seal to "pinch" on to.
I bought a 4 foot sheet metal bender on sale at summit racing. I work with sheet metal enough and the price was awesome. Plus no shipping. Fabbed up some fenders from diamond plate.