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 from here on Thingiverse 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. I've included printing instructions (though it is a VERY easy print - no supports required) and the video below demonstrates how things are easily fitted together.

**WANT TO TIP?**
My design for these planetary gears was inspired by a build by PCGEAR https://www.thingiverse.com/thing:3047454 and whilst mine was a completely separate build, I still feel that if you're good enough to want to give a tip, it should go to him. If I hadn't seen and tried his version, I would have never made my own. So my thanks go to PCGEAR for the inspi