- 1x Hobb-Goblin/MK8 hobbed gear thingy - 1x 624 bearing - 1x M4x18 screw - 4x M3x18 screws - 1x ~10x30mm spring, 1mm wire dia ([EU] Conrad/Voelkner has perfect 10.5x28.5mm springs) - Some M3 washers - G1/8 bowden coupler (e.g. E3Dv5 coupler) - Regular 4mm bowden tube Other screw lengths, e.g. 20mm are also possible with some extra washers.