Geared tracker for astrophotography

Introduction
This astrophotography tracker was designed for use with a lightweight camera & lens combination to allow long-duration photographs to be taken of the night sky. It was created to meet my specific needs but, as it's designed using OpenSCAD, it should be readily adapted if any changes need to be made.

So far this has only been tested by tracking the sun as the night skies where I live are heavily polluted by light from neighbouring towns and industrial areas. I haven't had a chance to photograph any stars at the time of publishing this design - I'm waiting for an opportunity to get to a truly dark location.

I should add that I am a novice in the world of astrophotography, so I might have made some inaccurate assumptions - if you spot any, please let me know in the comments.

Acknowledgements
I will say up-front that significant parts of this tracker were put together after studying other people's designs. I haven't copied any part directly, but their ideas kicke