Mini-ITX case (Mr_Brown) Full Height ITX version

This is a remix of the body and backplate of Mr_Brown's very neat Mini-ITX case (Thanks for a great design!).
https://www.thingiverse.com/thing:3529439

This version lets you put in a Mini-ITX board with a full-height IO shield. I also added holes at various heights for a power button, a USB-C header (like this one https://www.amazon.com/dp/B0CTLP338H ), and two holes (left or right) in the read the 5.5mm jack of a Pico PSU. Since the body is meant to be fabric-covered, any un-used holes will be covered up (even better, leave the support material in whatever holes you don't use to make it more smooth).

The rear bracket for the IO shield was modified and there are two versions:
- The 2tab version is if you install the bracket and IO shield before putting the motherboard in. This is super tricky, so I recommend
- The other has only one table at the bottom. This allows you to put the IO shield into the bracket and then insert it from the outside with the motherboard already mount