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I really liked the way of organizing the filaments flat against the wall, but that had the big disadventage that the color of the filament is much harder to see, since not all spools have cutouts on the sides.

Therefore, I came up with this design...This filament holder comes with a little cap, that I recommend you to print with the same filament you'll be putting there, it also don't has any visible screws, so gives a really cool apperance, like it was glued to the wall while being much stronger.

It's really easy to install, just:

• Use a screw to install the little pin holder with the wings facing away from the wall (see IMG-11).
• Insert the base matching the pin holder and slide it down.

--- The base has a diameter of 52.5 mm, but in case you have spools with a different diameter please feel free to contact me, I'll be glad to add the new version in this same post :)--- I also included a second version of the cap with a flat top, in case you want to customize it with a different design or a logo.