Hypercube Filament Guide With Filament Out Sensor

I wanted to add a filament out sensor to my Hypercube, so I redesigned my filament guide to integrate an microswitch into it. The top of the guide is sized for a 6mm tube to go to the extruder. I ran a three condustor wire to my Duet board and connected it to the E0 sensor port. I only needed two wires, one for 3.3V to the common terminal and one to the NC terminal on the microswitch so that the input goes high when the filament runs out. That will make the printer pause, and more filament can be loaded and the print resumed.