These translators can be used to build your own geardrives. They are compatible with 6mm brushed motors and have holes to attach spur gears with 0.76mm shaft pins.

Attach gears with shaft pins. The shaft pins are a very firm fit and may need to be cut to length and sharpened.

This translator can be used to make the following geardrives.
Click on each image for more details and a component list.

12 to 1 Ratio	16 to 1 Ratio	4 to 1 Ratio
5.33 to 1 Ratio	6.66 to 1 Ratio