Necessary hardware:
Note that the OTG microUSB port is not usable with the USB hat connected, as such I didn't make it accessible through the case
I'm using Recalbox as OS, check out their tutorial on wiring/configuring power led & buttons: https://wiki.recalbox.com/en/tutorials/others/add-on-off-button-to-your-recalbox
The author marked this model as their own original creation.