Convenient Spool Holder and filament guide for Prusa i3 mk2

[Edit 25/05/17] Having just received big 2Kg spool which are 20 cm wide, I added a large version of filament guide. A long threaded rode is then needed for axis. [Edit 11/05/16] I made a new axis with smaller diameter that roll smoother on the arms. The file is "Spool Holder v4 - Axis.stl" [Edit 09/16/16] I've been requested for the sources of the thing, so I added the 123D Design source file. enjoy ! The full print is possible on a Prusa i3 MK2 with 250 * 210 mm heatbed. For 200*200 heatbed however you will need to do multiple prints from individual stl file. All the new files are labelled with version 3.25 [Edit 08/14/16] In order to reduce stress on the filament when the extruder is at top Z position, I made some modification from the initial design: Longer arm and bigger hole in the filament guide, as well as a reversible montage, allowing two position with 5 mm higher or lower position. The filament guide is then higher with less angle on filament in high ext