Microswitch holder for filament detection (two versions)

A holder for detecting filament using a microswitch. Used for pausing prints when filament runs out.
If you want to put it next to the filament roll (easier, no need to route wiring through signal chain, but a lot of filament remains unprinted), print "Shell 1" and "Shell 2", any normal material for 3D-printing should work.
If you are going to put it directly on the extruder (If you have a direct extruder, you have to route the wiring through the signal chain, but only a few cm of filament wil