Fully 3D printable gearbox

 This design is modular. It is also fully 3D printable.

It has a maximum gear ratio of about 1:81(recommended) if you decide to build the first version of the design. The second version of the gearbox has a maximum gear ratio of about  14 348 907:1.

The size of the gearbox is about 23cmx18cmx13cm, or 25cmx23cmx22cm ( addon ).

Gearbox print time: about 46 hours *
Gearbox weight: about 681,5 grams

The weight depends on the gearbox's configuration

*Prusa i3 MK3 printing profile profile

Addon print time: About 11 hours *
Addon weight: About 170g