Planetary Geared Extruder

This is a variant of Nylocke's and Glacian22 EZFlex extruder. It is a direct replacement for Seemecnc's EzStruder.
Designed for use with 1.75mm filament and a Nema 17 Planetary Geared Motor.
Like Glacian22 extruder, it can handle flexible filaments very well.

Nylocke's design: http://www.youmagine.com/designs/ezflexstruder
Glacian22's design: http://www.thingiverse.com/thing:744759

I'm not good at explaining the assembly in english, so I hope the pictures can show it clearly.

BOM:
- (x9) M3x10mm bolt
- (x4) M3 nut
- (x1) M4x30mm flat head bolt [Arm to Body. It needs to be a flat head bolt, so that the bearing can rotate freely]
- (x3) M4 nut (or nylon lock nuts)
- (x1) M4x50mm bolt [Body to Mounting Spacer to Mounting Bracket]
- (x1) M4x40mm bolt [Body to Mounting Spacer to Mounting Bracket]
- (x2) 684ZZ bearing (9mm OD, 4mm ID, 4mm thick)
- (x1) 625ZZ bearing (16mm OD, 5mm ID, 5mm thick)
- (x1) EzStruder Spring [don't know the specs]