Even though this first iteration using off-the-shelf parts is a lot bulkier than it needs to be, we can still test the out a scaled up version of the intended form factor. This 3-piece case consists of a chassis with attachment points for a strap or wristband, a clear diffuser cap, and an overside button that attaches to the tact switch.

After a test fitting an initial print, these CAD files will be going into the repository. Between this and the Adafruit BOM anyone should be able to reproduce the setup.