Filament Runout Sensor Ender 3v2 Endstop

Re-using the old z endstop switch to mount to the top 20x20 extrusion on my ender 3v2 for direct drive. Might add a reverse bowden fitting once I upgrade to a BMG on the hotend.

Remixed from draggOP's design on thingiverse. https://www.thingiverse.com/thing:4745932