Filament Guide A20M

I recently bought a Geeetech A20M and noticed, that if the filament spool is almost empty, the angle by which the filament is pulled into the Filament Runout Sensor is way too steep and the filament gets blocked. I had a few ballbearings "ABEC9" laying around and created these filament guides. Works quite well for me.
You need to print each bracket once, and the roller 4 times:
The bearings are also called 608ZZ.
Dimensions are 22x8x7 mm (OD x ID x W - Outer Dia 22mm, Inner Dia 8 mm, Width 7