I tried to design a slim enclosure again using a channel outside between the top and bottom part to let the case apear more flat - and, to cover possible impressisions ;-).
I recommend to print the parts in different colors.
To fasten the controller board to the bottom part, first put the distance cylinders between the boards and use metrical screws M3 x 12 (14).
Both will work without tapping before.
There is no room for hexagonal pockets in the top part. You can screw M3 x 16 directly into it.
The second bottom part contains several screw nut deepenings for fastening the case as you like. If you mount it to an 8 mm rod you can use the case clamps.
If the cables are plugged in, the case inevitably has a slope of 6°. In case you need more slope:
I'm already thinking about a base that can be screwed below the housing.
If you are interested, look out for this thing which I will publish separated.

And yes, don't forget to assemble the distance cylinders - the display's bord won't like it ;-)