Fully Printable Modular Windmill / Windvane / Whirligig

Video of it in action: https://i.imgur.com/TIBUhLD.mp4
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This is my attempt at a whirligig / windvane / windmill thingamajig which is modular, meaning that you can swap bits in and out for different actions and movements and features.

The only part you will need with this is an R4ZZ bearing but I also designed a simple 3d printable bearing. It won't be as efficient but it's an option.

I recommend gluing woodpecker body halves. I would also glue everything because the wind can really put a whoopin' on it when it's blowing hard.