I got a Diamond Cargo 7x16 a few months ago - still working on the conversion. The trailer is fine and you can configure several options if buying new. If I knew then what I know now, I would have gotten the white lined metal inside with ATP floor and let them insulate the walls and ceiling. The plywood is put on with an air-hammered nail and is pretty much impossible to take off without damaging the interior plywood and trim. My advice is to have them put any options you're going to want on the trailer - you will have plenty to work on from that point forward.
