CR10 or CR-10 vertical low filament guide with spring clip

This is a remix of my original vertical filament end monitor.

The original was a friction fit on the extruder bracket. It was snug when I first used it, but the PLA was worn away slightly by repeated friction from the rough metal,, so it became loose.

The latest version clips in place. The clamp mechanism all prints in one piece with the rest of the holder. I tried to print it with a spring mechanism too, but it was not strong enough, so I made the spring as a seperate file; there are m