Sometimes we don't have place to use the original filament holders. This was the case when I bought my second printer.

I had to place the filament outside the wooden cabinet. Guide the filament through the wall and bring it to the center of the printer.

Therefore I've created the Filament Wall Guider. You can mount this with a few screws on a wooden wall - outside the cabinet. Guide the filement through the wall with the

two filament wall guiders (which fits together). The filament guider can be placed on the top of the printer and was designed for the MK4.