This is a remix of the adafruit Raspberry Pi Zero case. I enlarged the USB holes a bit and added a chamfer to the inner top part of the holes to make it easier to squeeze the pi zero in. Also chamfered the posts for the mounting holes for a better fit.
Closed the hole on the top a bit because you don't really need such a big hole to grab the sd card.
Source file existent
Many thanks to Noe for providing the source file - or better the download link to AutocadFusion 360 where the file can be exported in many formats!
I didn't add the source file of my customization because I am not sure about its license. If you need it badly, then get back to me and Noe.