I haven't had any problems with the fridge so far. I have the bag for it and I think that helps a little.
The trailer box measures 4ft x 7ft at the bottom and, in the M416 style, widens at the top to 56 inches. The box is a little longer than I had initially planned but I wanted the water tank to be in the trailer instead of exposed. The front of the trailer is another 5ft where the truck box is and the tongue is completely removable so it can be as long as you want it to be. I can measure anything else for if you tell me what your looking for.