Here’s an ultra-minimal case for the Alchitry Cu V2 to protect the bottom while allowing access to the ports and addons. The Cu V2 presses in and stays firmly in place, with the case coming up level with the top of the board.
AlchitryCu2Case.3mf
This might work with the Au V2, but I don’t have one, so I can’t test it. It depends on clearances on the underside of the board.