Very nice case. Indeed we must carefully observe the instructions. The order is: The bottom spacer + 1 + 2, place the R-ft and 3 + 4, and the top which must be like the rest, think about removing the protective film. A very big advantage of this case, apart from its design that is beautiful, and being able if necessary to remove the access map without having to force on it; unlike most other brands or boxes out this map runs the risk of damage it. I do not put the 5th star because Connection Systems screws are plastic. Undeniably steel they would have made even a more upscale. But is not it here the opportunity to customize the box? Very pleased with this purchase, I recommend it enthusiastically.