Filament runout sensor with Ender 3 endstop switch - bearing replacement

This is my tiny addition to the filament runout sensor based on an ender 3's endstop. I used the z-stop from my printer which was removed for a BLTouch, and I realized, oh no, I don't have a bearing! I couldn't buy one (college student things…) so I opted to make my own solution. It isn't perfect, and it sure isn't efficient, but it works for now. I had to cut the switch's arm down a bit and bend it upwards to slot into the part, and glued it in place. It works well enough, and the lower the layer height/nozzle size, the better.

I hope that this helps someone in need.

I made a little design that works as a stand-in for the steel ball that's required for the model.