Filament Sensor (with filament guide) for Octoprint (Monoprice Select Mini)
thingiverse
UPDATE 9/2 2018: I've also included a fix for the top of the filament sensor. This adds a little box that pushes the switch down. This is a remix of BrianHanifin awesome https://www.thingiverse.com/thing:2427313 with a added filament guide (https://www.thingiverse.com/thing:2163508). I did this because my cable to the endstop was to close to the box. If you decide to print this you will need a sharp knife and some sandpaper to free the "ball" inside the filament guide. I'm sure this is not the best solution but this works for me.
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