I have created a housing for the Geiger counter GC-1602-NANO (CAJOE v1.1).
I left openings for the connections on both sides.
With the Plexiglass cover and the spacers, the Geiger counter fits exactly into the housing and closes flush.
More information about the Geiger counter can be found here: https://github.com/2969773606/GeigerCounter-V1.1
The design was inspired by: https://www.printables.com/model/141255-geiger-counter-gc-1602-nano-case
The author hasn't provided the model origin yet.