This is a shell for the version 3 pcb of the Sidecartridge:
https://sidecartridge.com/products/sidecartridge-multidevice-atari-st/
This shell only fits the version 3 pcb and assumes that you have flush solderied the Raspberry Pi to the PCB (no headers) and that you have aligned up it's pads evenly (so the USB port lines up in the rear).
I've provided all the STL files for printing as well as the STEP file for the case in case you would like to remix it.
Also note: I have provided a license for this design that allows for commercial sales as Retro Frog will likely not be offering it for sale.
The author marked this model as their own original creation.