Compound Planetary Gear

Not yet finished, ultimately the OpenSCAD model will be published and customizable on Thingiverse.

Here's a video of the thing in operation (gear ratio is -2209.85 to 1):
https://youtu.be/GvXuM1YQFO8

Based on designs and lessons from GDFW https://www.thingiverse.com/Gear_Down_For_What/about

Input ring gear: 41 teeth
Input planet gears: 14 teeth
Input sun gear: 13 teeth
Output ring gear 38 teeth
Output planet gears: 13 teeth
Gear ratio: -2209.85 to 1