See also description. BOM (non-printable parts) ------------------------- Planet holders: 3x M3 nuts 3x M3x14 screws (socket head cap, hex key, DIN 912) Case fixed on stepper: 4x M3x30 screws (socket head cap, hex key, DIN 912) Sun gear: 1x Bearing 688ZZ (8x16x5), to hold sun gear axis 1x (optional) M8f0,75 nut to fix sun gear axis