Original Prusa enclosure filament guide with filament cleaning section.

Guide A  has a hinged (non removable) box section and a fixture for the lid I used a kitchen sponge, cut out a rectangle (28x9x6mm) from it and pierced filament through it. After that guide the filament through the guides opening, place the sponge rectangle in the box and close the lid.

No need to print guide B as you can use the original one!

I guess you can split the rectangle in the middle so you wont need to pierce it with the filament.

Hope you like it! 

Additional box sextion for filament cleaning.