Filament Runout Sensor

I bought [some microswitches from Aliexpress](https://www.aliexpress.com/item/5-x-Roller-Lever-Actuator-Microswitch-SPDT-5A-Micro-Switch/32844879229.html) for a filament runout sensor, but I couldn't find one on thingiverse that I was sure would fit.

So I decided to make my own.

For this project you will need:
1x [micro switch with lever arm](https://www.aliexpress.com/item/5-x-Roller-Lever-Actuator-Microswitch-SPDT-5A-Micro-Switch/32844879229.html)
1x 4cm or longer length of PTFE tubing