Nema 17 Stepper 5:1 Planetary Gearbox with 5mm shaft for GT2 pulley

Nema 17 Gearbox with 5mm shaft, fits GT2 Timing Belt Pulley.
Remix of: http://www.thingiverse.com/thing:8460

Cover is in two versions with or without 4mm holes for M3 threaded inserts.

Bill of materials:
Nema 17 stepper motor
M3 nuts 6pcs
M3 threaded inserts 4pcs (cover, Kerb Konus S-Lok PN: 860 000 030.800)
M3 self locking nuts 3pcs (planets)
M3 washers 3pcs
M3x8 grub screws 2pcs (sun)
M3x16 3pcs (planets)
M3x8 4pcs (stepper motor)
M3x12 4pcs (cover)
M5x30 1pcs (shaft)
M5 self