Yesterday I turned my attention to building a case for the Haunted Keyboard, and found that the hobby boards at my local hardware store were perfectly the right size to be layered to form the case. 

There is one 1/4" walnut bottom piece and a 1/4" riser inside to account for the extra depth of the Pi Pico and USB plug. The side walls are 1/2" walnut, and all of it is simply epoxied together to form a nice little enclosure. There is a hole routed out the back for the cable, and the board is attached with screws to the bottom pieces. I'm glad I put those mounting holes in. 

The resulting sound is what I want to work on next. This board sounds pretty good, but I haven't done any of the standard things to improve sound, like lubing the switches or adding foam anywhere. Perhaps that will be a next step.