Features 1 Shorter drive gears 11mm vs 15mm2 Hardened filament drive gears manufactured byBondtech3 Weight reduced to 135 grams4 Smaller more compact dimensions 11 6 shorter 5 New motor design offers 40 increase in pushing force in real printing conditions and much improved acceleration performance6 Flipped drive gears filament path closer to the extruder center for a more balanced design and perfect fit on deltaprinters as well7 Stainless steel filament exit guide with 0 2 0 3mm clearance to drive gears for best TPU printing experience and extreme wear resistance when using abrasive filaments 8 High temperature resistant injected housings GPA129 Machined PEEK secondary drive gear sleeve10 Tension mechanism with grab screw design Captive Grab Screw 11 Mounting screws in line with filament exit path improving housing stiffness and easier mounting12 Perfectly aligned filament path13 New smaller and better PTFE input coupler14 Motor position rotated by additional 10 degrees for easier maintenance and assembly15 Filament sensor add on with auto load and unload button add on feature16 And many more small changes to improve mechanical accuracy and design lookBasic Configuration Steps 690 steps mm 16 micro steppingMax instantaneous speed change jerk 600mm min RRF 10mm s Marlin recommended 300 5 Pressure advance 0 02 0 03s to be calibratedRetraction 1 1 5mm to be calibratedRetraction speed 120mm s reduc