One of the goodies from the Hackaday Superconference was an Adafruit HalloWing. And I thought: surely a Jolly Wrencher case must be made for this skull-shaped circuit board!
So I remixed an existing clip-on case that fits the battery (Thanks DoctorWhich!), added the Jolly Wrenches and printed it out. It came out pretty great. Though now I wish I had some black PLA.