Prusa Xl filament sliding guide

At the entrance of the third filament of the Prusa XL, depending on the filament position, the filament may be too bent. Especially with the Sunlu S4 filament dryer, the filament angle becomes more bent. So, I attached a roller in the middle to make the filament insert smoothly.

Secure it with strong double-sided tape in the appropriate position, as shown in the picture. It used a 608 bearing. 

You have to inset the bearing fixing pin and slightly widen it from the inside for the ring to rotate well.