- top case - bottom case - USB cable cover - Cherry MX switch (37 pieces) - 1N4148 diode (or similar, 37 pieces) - Adafruit ATmega32U4 breakout board or Teensy or similar USB-enabled controller board - 3DConnexion SpaceNavigator - USB cable - thin flexible wire for wiring - thin heatshrink tube - M3x12mm pan head screws (9 pieces) - M2x10mm nylon screws (or similar to mount the controller board) - optional PCB connector pairs (suitable for chosen controller board) - optional 3mm LEDs