Just put together one of your cases and though it's a little fiddly with the plastic side supports for the board it was still a 2 minute job to put together.
I put 3 of the supports in on one side, added the board, put the remaining ones in, added the top (which is when it became more stable), then holding the sandwich threaded the first bolt through adding the centre cylinder and bolted it together. Doing the opposite corner it's now stable and the rest is just finishing the remaining sides and putting on the feet. All possible to work out from the photo.
The only improvements I would suggest would be rubber and steel washer feet (so no sticking pads to the bottom plate is required). I took it apart again after seeing an original photograph so removed the feet and cleaned off glue and popped the clear plate on the top and the dome nuts on the bottom, it took a few minutes more as the plastic side supports kept falling out but I got it eventually. For the price I'm very impressed.