Planetary Gearbox 4:1 Stackable

This is a 4:1 stackable Planetary Gearbox, designed with just enough slack in the system to mean it should work perfectly first time. I've printed a few other such gearboxes and couldn't get them to work because the tolerances were too high... this shouldn't be a problem here. Stackable means you can print two or more gearboxes and insert them into each other, increasing the overall output ratio, ie 4:1, 16:1, 64:1, etc. VERY easy print - no supports required) and the video below demonstrates how things are easily fitted together.

JUST ONE STIPULATION... if you feature this in a YouTube video, please name me as the Creator and provide a Link to this file AND to my follow my YouTube Channel.

https://youtu.be/0ow4x0jadJY