Well, this was a remix of the Wades extruder, for some reason at the time of posting i couldnt find the original to give credit. For use with 1.75mm filament. MK8 style for use with my anet a8 setup,the original is a MK7, the steppers spin the opposite direction.
You'll need some extras as in a 8mm hobbed bolt (24mm from botton of bolt head to center of the hobbit), and some M4 55mm long bolts & nuts (4). Also needs three 806 bearings, and 20mm of 8mm smoothrod, 4 springs. 20mm of 8mm smooth rod