this is for those who want the Filament in its own box to keep it dry and free of dust, above the Printer on its own shelf.
I have used a m3 brass thread insert inside the Mounting.
40% fill, 1.75mm PETG Black
and if you want one with the option of attaching with a nut, this one is for you: https://www.printables.com/model/339810-filament-run-out-sensor-mounting-ender3-s1-v1
The author marked this model as their own original creation.