Big Red Bluetooth Game Show Buzzer

I made 3D printed, Bluetooth connected, game show buzzers for playing The Voice at home, powered by Adafruit Circuit Playground Bluefruit boards and a laptop.  Find the full story including build instructions in my blog post.  Here it is in action:

Parts List

• Code for the Bluefruit and the laptop are up on github.
  • See readme for setup details
• 1 LiPo Battery Charger (the Circuit Playground Bluefruit will not charge the battery)
• For each buzzer:
  • 1 Circuit Playground Bluefruit - Bluetooth Low Energy
  • 1 Lithium Ion Polymer Battery 3.7V, 500 mAh
  • 4 Cherry MX switches (I used these, but would recommend getting a version with more of a ka-chunk)
  • 5 Adhesive rubber feet
  • 3 M3 x 5mm screws and nuts
  • Hookup wire for the switch
  • Print one of each
    • button
    • Knopf-4x.stl from Big Emergency / Panic Button for MySensors / pimatic (not in this design)
    • top
    • bottom
    • window (clear filament, I used Overture Transparent Filament Clear PETG)
    • battery cover

Build Instructions / Notes

• First off, this is not going to win any mechanical engineering awards, but that's what you get when let the code monkey do CAD on a time crunch. Everything is "smash fit" and as such will be somewhat sensitive to your print tolerances.
• Friction fit from the nuts hold the Bluefruit board in place. Add as many as you think are necessary.
• Wiring is real simple. Only one of the key switches is actually connected (polarity doesn't matter), the others are just for mechanical support. I opted to use screws and nuts for the connections instead of soldering in case I wanted to repurpose the Bluefruit boards at some point, but of course soldering would work too - you do you. The key switch gets wired to the TX pin and any of the GND pins: