Well, I had no idea this design would be interested so many people. I very much appreciate your comments, so I am forced to make some changes in the design, for this time the base is integrated, the arm that guides the filament is removable and can be snap on.

Personally I recommend this latest version as this printed on one piece and uses much less material.

Currently working in add the filament dust-filter again to the design.

Also I recommend using PTFE tube for the filament flow freely and does not bind.

Attaching is the original file in OPENSCAD for those who want to change it, notice I'm not an expert in openscad, and I am more than sure that anyone with some knowledge on this program could clean up and better the code.

--- BELOW IS THE OLD DESCRIPTION OF SPOOL HOLDER, LEAVE BY REFERENCE :
Spool holder for the M3D, this design is complemented by the Drifterific's M3D Micro Slotted Gopro Mount (base) http://www.thingiverse.com/thing:741364

This is an improved version M3D Micro Spool holder attachment (http://www.thingiverse.com/thing:767684) and the M3D Micro Filament guide attachment (http://www.thingiverse.com/thing:767834), It requires the use of PTFE tube to guide the filament.

--- END OLD DESCRIPTION

Here is a video https://www.youtube.com/watch?v=m8Iy39tHdnQ (OLD VIDEO)

* UPDATES ***

Please check the AnSy (http://www.thingiverse.com/thing:959515) design, personally I think is a better design for the filament guide.