Tension screw (x1)extruder tension spring (x1)m3 screw L50mm to tension latch (x1) m3 brass incert L4mm for tension screw knob Latch (x1)m3 screw L30mm on latch hinge (x2)m3 spacer L4mm ID3mm OD6mm on hinge Top case (x3) m3 screw L30mm to fascen top case to center case (x1) m3 brass incert L4mm for tension screw (x3) m3 spacer L4mm ID3mm OD6mm for filament insert and hinge (x1) mr128 bearing L3.5 ID8mm OD12mm for 8mm extruder shaft (x1) bowden coupler M9 thread 6mm tube insert Center case (x3) m3 brass incert L4mm to fascen top fasceners (x1) mr128 bearing L3.5 ID8mm OD12mm for 8mm extruder shaft (x3) m3 screw L28mm to fascen center case to bottom case Bottom case (x4) m3 brass incert L4mm for center fasceners (x1) mr128 bearing L3.5 ID8mm OD12mm for 8mm extruder shaft (x2) m3 screw L11mm to fascen top part of extruder (x2) m3 screw L25mm to fascen bottom part of extruder Additional parts (x1) Shaft L55mmxD8mm (may have to add your own flat) (x1) bondtech gear (3mm filament version) set with W4mmxL22mm rode (x1) Gt2 60T pulley, belt width 10mm, center hold ID 8mm (x1) Gt2 20T Pulley, belt width 10mm, center hole ID 5mm Note: when tightening to motor shaft gear should protrude from shaft by .5 to 1mm (x1) Gt2 closed loop belt L150mmxW10mm (x4) m3 washers when fascening bolts to extruder motor Shaft assembly (8mm) bearing (from bottom case) 1mm spacer pulley 60t (grub screw side "up") .5mm spacer bearing/center case 4mm spacer bondtech gear .5mm spacer bearing/top case Update Ultimaker firmware download Tinkergnome: https://github.com/TinkerGnome/Ultimaker2Marlin/releases Upload using cura: settings --> printer --> Manage printers --> Select printer and click update firware --> Upload custom Firmware Change esteps on extruder Maintenance --> Advanced --> preferences --> Motion settings --> Axis steps/mm Change E from 282 to 587 (number derived from calibration test) Save changes Invert extruder direction Maintenance --> Advanced --> preferences --> Motion settings --> Invert Axis Invert E Save changes (optional) Run a 100mm calibration test Create a file called "calibration.gcode" and add the following entries M302 G91 G1 E100.0 F300 G90 Save it to an SD card and print it. It should move 100mm of filament through the extruder. Notes: Must use button head M3 screws Use grease on bondtech gears Use loctite on screws Printed the case at 30mm/sec