Arm for filament

I designed a LED bar with invisible cabling for my U30 Pro :
https://www.thingiverse.com/thing:4239989

This arm is intended to be attached on the left of the LED bar.
If you don't want to install the LED bar there is a standalone support.

The arm as a kind of "curly tail" to hold the filament, it helps to fix or detach it without removing the filament from extruder.
You have to print it with supports and clean the supports with a pliers and a scalpel.