An easy way to upgrade your TEVO Tornado 3D Printer with dual extrusion for less the $50!What to buy: TEVO Titan Extruder (without pancake stepper motor) NEMA 17 48 mm Stepper Motor Trianglelab TL-Feeder (Set 1)What to print: Dual Extruder Mount Flexible Filament Mount (for PVA and flexible... By: BoSnap