I designed a case for a jumbospot board with OLED and a raspberry pi zero w. I also designed two interchangeable case lids: 1 with the antenna hole and 1 flat top for use with an internal antenna.
The screws you need to hold the raspberry pi zero w down are 2 m3x4 screws. The two screws that go through the top and secure the lid to the bottom are 2 M2x25
3D Solutech PLA
see through blue and real black