Here are links for files to 3D print a very minimal case for the DreamBlaster X16 or X16GS MIDI synth board that covers the bottom and is great if you’re using one connected to USB on a computer. I’ve included versions with and without the header, in case it’s been removed. These designs were created by me using FreeCAD. I recommend attaching a small heatsink on the Dream SAM5716B chip, they can get quite hot otherwise.

https://www.strangeworld.com/devel/files/DreamBlasterX16Case.3mf
https://www.strangeworld.com/devel/files/DreamBlasterX16CaseNoHeader.3mf