NEMA14 triple geared bowden extruder

thingiverse

Mendel 90 owners can now upgrade to a hybrid dual extrusion system, allowing them to print with two different materials at once. This feature is made possible by the addition of a second hotend, which can be easily installed on the existing Mendel 90 frame. With this upgrade, users can switch between materials quickly and easily, opening up new possibilities for complex prints that require multiple colors or textures.