About this 3D model

This has to be one of the most useful accessories I've made for my 3D printer. I was surprised at the improvement this made to the quality of my prints. This is intended to be used with a desktop spool roller (like the one in the second picture, http://www.thingiverse.com/thing:453542 ) The pulley system really does keep the filament from binding which allows the print head to move more smoothly. . See Instructions tab for Bill of Materials and assembly instructions