This is a very simple and economically minded case for a Mister Stack using the QMTech Clone board.

The User port does not currently work as QMTech has modified the Arduino pin configuration, but the LEDs, buttons, video output and audio all work as they should.

These are the parts I used.

QMTech Mister clone board with onboard RAM

Generic USB Hub board with USB power delivery: https://www.amazon.com/gp/product/B0C5TXQG6C/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

A 5CM Micro USB up to Standard USB A UP ribbon cable to connect the USB board to the main board: https://www.amazon.com/gp/product/B07X5YHMJN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

And an off the shelf Analog I/O board

I used 15 mm X 6 mm M3 Nylon standoffs between the Hub and Main Board, the Main Board and Analog I/O Board and on top of the Analog I/O board to accommodate a fan.

I used 6 mm X 6 mm Nylon Standoffs on the bottom of the USB hub board to create some space and allow the bottom plate to screw on.