Simple filament extruder puller

Simple filament puller from extruder. Stepper motor controllers is required to use this.

Part 4_spacer is for fitting 6mm axle to 8mm ID bearings. No need if there are available more suitable wheels

Parts you need:

Nema23 stepper motor
2X 50mm wheels (furniture wheels might work!!)
2x 608 skateboard bearings
Few M4 screws, couple springs and nuts.

UPDATE 24.3.2015
Minor tweak on lever holes, for easier function.

UPDATE 28.10.2015
Alternative version for base, now with nema 17 and 23 bolt patterns.