This is a case for the Sega 16B dial selector designed by oneleaf86 on the Arcade Projects forums.  This case may also work with the Sega C2, and IREM M72 variants of the same selector.  Also included is a holder for the ethernet jack that is used to link from the selector to the arcade multi pcb, this allowed a wire harness to be run to the dip selector header instead of directly plugging the ethernet jack pcb, that allowed me to use this selector in the case I was using.

https://www.arcade-projects.com/threads/multi-game-selectors-build-your-own.8196/

When printing this I used PLA+ with the following overrides to the defaults in Cura:

• Top Layers: 5
• Bottom Layers: 5
• Infill Density: 60

Depending on your material the above may or may not be needed, I found default settings with PLA+ didn't provide the rigidity that I required.

Hardware needed to build the case:

M3 screws
M3 nuts
M3 aluminum washers
Rubber feet (optional)

M3 screws: https://www.aliexpress.us/item/2251832624537980.html?spm=a2g0o.order_list.order_list_main.56.150f1802zjyl5q&gatewayAdapt=glo2usa
Washers:   https://www.aliexpress.us/item/3256802497417613.html?spm=a2g0o.order_list.order_list_main.14.150f1802zjyl5q&gatewayAdapt=glo2usa