After I received my new PCBs I wanted to get a feel for them and start using them as fast as possible. So I grabbed a 22mm thick sheet of MDF from the stack and started cutting in to it.
For the tray to have a bit more strength I soaked it was watered down wood glue a couple of times before I painted it black.
The result wasn’t amazing, or above average. But it at least let me start using my new nice pcb and keycaps while I created the first proper case.