Kossel chocolate (paste) extruder conversion

Summary Chocolate (pasta) extrusion module for Kossel 800. 28BYJ-48 converted to bipolar stepper and connected to extruders A4988 driver. http://www.aliexpress.com/item/28BYJ-48-Valve-Gear-Stepper-Motor-DC-12V-4-Phase-Step-Motor-Reduction/32295584569.html Big 100ML Syringe with nozzle http://www.aliexpress.com/item/New-2015-Reusable-100ML-Large-Big-Plastic-Hydroponics-Nutrient-Measuring-Syringe/32440818115.html 12V Carbon heater for prolonged chocolate print http://www.aliexpress.com/item/New-Arrival-12V-Carbon-Fiber-Heated-Pads-Winter-Seat-Warmer-Multifunction-electric-Cusion-heating-Mat-Blanket/32445358801.html Videos: First try: https://www.youtube.com/watch?v=SOMnSZ0KKSg First success: https://www.youtube.com/watch?v=-BkINgN53EQ&feature=youtu.be Print Settings Rafts: Doesn't MatterSupports: Doesn't MatterResolution: 0.2Infill: 50-100% Notes: Gears printed with Nylon Body printed with PLA