Case for a minidexed build based on this project: https://github.com/handeyeco/minidexed-pcb

The case is comprised from 6 pieces: the top half, the bottom half, two small feet and two big feet. The feet snap into the bottom case and the two halves are attached to the main board via m3 screws and standoffs. 
You can stick rubber feet onto the printed feet for more grip.

The before last image is the build without the case and the last is from CAD showing the standoffs in red.
For this build you'll need these m2.5 standoffs:
4x 10 mm standoffs,
2x 12 mm standoffs, 
2x 6 mm standoffs,
2x 18 mm standoffs (or, as I did, screw together one 6 mm standoff with a 12 mm one and you're good to go).
I got these standoffs off aliexpress, it's this set: https://www.aliexpress.com/item/32862529967.html

I built this with standoffs as I intended to laser cut a case from acrylic, but lost access to a laser and decided to just 3d print one.

Printed this out of PLA with 15% adaptive cubic infill, it came out nice and sturdy.