I was super annoyed by weird noises from my filament spools. Turns out sometimes PTFE tube drags everything extremely out of alignment and filament doesn't unroll smoothly. 5 minute print solve this and in my opinion it looks quite good. Light grey PLA would blend perfectly. 

If you are like me and constantly change rolls or hang spool holder in different places this super quick print will be nice addition to your setup. 
 

Instalation:
1. Unload filament
2. Disconnect PTFE tube 
3. Remove screw from PTFE tube holder (2mm allen wrench)
4. Instal washer
5. Screw it back.

I hope installing it is straightforward but let me know if You would like to see some more detailed installation guide.