Print one each
Ring Gear
Planet Carrier
Cap
Dowel
Sungear
Print 3 Planet Gears.
Assembly Install 4 bearings on the planet carrier.
Install 2 planet gears on the carrier.
Insert planet carrier into ring gear, and add third planet gear.
Install Sun Gear
The author remixed this model.
Added spot for a bearing on the sun gear.
Slightly increased the size of the ring gear and added a cage to keep the gears in place.
Added an alternative spinner cap to chain multiple gear sets together.