SFW BLE Macropad - 6-switch case (ESP32-C3 SuperMini)
https://www.samuelssstuff.xyz/firmware/flasher/SFWMacropad#bluetooth

Two parts, no screws:
  top shell  - 71.15 x 52.10 x 21.5 mm, 2 x 3 MX switch plate (19.05 mm spacing, 14 mm cut-outs, 1.5 mm plate)
  base tray  - snaps into the shell; deep walls hide the wiring; raised pocket holds the C3 SuperMini
               (18 x 22.5 mm) with its USB-C port at the slot in the back. Total height closed: 29.5 mm.

Printing: PLA, 0.2 mm layers, 2-3 walls, 15% infill, no supports.
  Top shell: upside down (switch plate on the bed).  Base tray: the right way up.

Assembly: clip the 6 switches into the plate, solder one wire per switch to a GPIO and the other legs to GND,
drop the SuperMini into its pocket (USB-C towards the back slot), then press the tray into the shell until it clicks.
Small notches on the short sides help to pry it open again.
