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Looks like the prop makers of the movie used a lead screw coupling and bashed it together with some tubes and other parts. When I saw it I went like the Leonardo DiCaprio meme pointing at the TV.
There used to be a subreddit called /r/thatsabooklight that would point out this kind of stuff in movies and tv shows. Was a fun one to follow.
Is that a stepper motor coupling or am I missing something obvious?
Edit: I did not notice OP‘s comment sorry