Gan 4x4 manufacturing process

I'm surprised they don't use cube assembly robots like moyu. But a 4x4 is way more moving pieces than a 3x3.
I thought they also weighed the puzzles at the end to see if anything was missing? Idk how important a washer is
Thats a lot of interesting questions.

I think the manufacturing process is still unknown to the majority of the users.
 
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