Update: 3/17/2016Added Counterweight Suspension System for the Flying Extruder to minimize additional load on the stepper motors. This makes the whole extruder virtually weightless. Please print New Plate.stl. This moves the suspension point at the center of gravity of the motor and is adjustable. Check out new file and video. Sorry pulleys are still in beta but they work! Thanks!You will need a slightly longer bowden tube since you will raise the extruder. Get rid of the knob and replace it with a M3x25mm screw and washer and cut a piece of rubber tubing to act as a spring to push the lever on to the filament.-----I would like to give credit to WASProject of Italy for their Suspended Bowden from which I derived the design of this Flying Extruder. http://www.wasproject.it/w/bowden-sospeso-di-wasproject/Extruder design based on http://www.thingiverse.com/thing:63674The STL file included is for extruder drive gear with 6mm effective ID and 8mm OD (gear_radius=0) . Please change this value in the SCAD file if you have an MK8 drive gear (if 11mm OD, add 1.5 to gear_radius, i.e. (11-8)/2 ).DO NOT print plug.stl It is used for the SCAD file, for "tapping" a 1/8 BSPT thread SCAD files are included for your customization. (Nema 17.scad file is from Johann's Kossel Mini files)https://www.youtube.com/watch?v=YHL6YH66mjkhttps://www.youtube.com/watch?v=MKSP9Yhn4oI