The folowing B.O.M. is suitable for mounting the extruder to a Prusa i3 X-carriage.
(2) Idlers (Printed)
(2) Bodies (Printed, One mirrored before printing)
(1) NEMA 17 Stepper with M5 shaft
(1) 608 Skate Bearing
(2) M3x25 Screws
(2) M3x45 Screws (or M3x40?)
(1) QU-BD Drive Gear (10.5mm Hobb Diameter), or similar