Raspberry pi zero modular case

I'm super new to this(10 hours 3D). And i don't actually have a raspberry pi zero to use for reference. Every thing was taken from schematics and forum post. so if someone spots errors please comment them.


My ideal is to create stack able modules like. usb hub, DAC, external antenna, display .you get the idea. just pop off base or top cover add mod and longer fasteners.