Filament sensor for reverse bowden setups.
Works with common mechanical endswitches, easy to wire, reliable.
Works great with Octoprint for Filament Sensor NG Plugin.
The 5mm side hole is used to mount it "floating" on one axis to further reduce strain.
On the intake side a small piece of bowden tube needs to be inserted.
4x M3x15 needed to assemble the sensor case
1x M5x30 needed for mounting it. ( can be any length really )