I updated the top enclosure design.

The hole for the USB port was a bit too much to the left, and it's now centered.

The side walls were a bit too thin (0.90mm). I initially made them that thin to use some snap-fit. But it wasn't necessary in the end: the print tolerances make enough extra width in both top and bottom enclosure to make the necessary friction. With 1.80mm walls the case is now stronger, and it's much easier to remove the supports without breaking it.