Driver station for a slot car track, with holes for a voltmeter, track call button, direction switch and, of course, a controller socket.
Very simple print, no overhangs or bridges.
This is the hardware I used:
Controller socket: Neutrik NC3FAH1 XLR Female
Volt meter: DC 30V 2 Wire LED Digital Display (48mm x 29mm x 22mm)
Track call button: LED 12mm illuminated Metal Momentary Push Button 3A/220V DC
Direction switch: 12mm DPDT 6A 240VAC Heavy Duty Centre Off
Most of these items came from eBay but are commonly available at other places that sell electronics.
See attached wiring diagram and controller wiring for POSITIVE track wiring (like most commercial tracks use).
The author hasn't provided the model origin yet.