I'm adding filament sensors to my printers, and found this design that combines the microswitch holder with a filament roller guide:

https://www.thingiverse.com/thing:3357097

The design did not attach very securely to my Ender 3 Pro. I was already using this design was a filament guide:

https://www.thingiverse.com/thing:3052488

It attaches very securely, so I combined them to make the filament sensor attach much more securely.

The images show the original filament sensor, the filament guide I combined with it,m and the final product.

Creality

Ender 3 Pro

No

Yes

0.16

25%

I combined them in TinkerCad and printed it in PLA