About this 3D model

The LYMAN FILAMENT EXTRUDER V3 is a complete filament extruding assembly for extruding 3D printer filament. It extrudes and winds the filament onto a spool which it then ready for use. The BOM shows a cost figure of near $900. The extruder alone can be made for under $250. See the video on YouTube: http://www.youtube.com/watch?v=p_E7crY9wfg