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> For something that is ready to enter manufacturing I think a pre-order model is appropriate.

Do you have proof this is the case?

The video of it fully operational & functioning, perhaps?

No, perhaps not. There is no visual difference between a well made prototype and a zero-batch machine or even a production item. But there is a huge difference in the amount of work that needs to be done to get from the one to the other. Sometimes years.

The last 10% takes 90% of the time is true in hardware manufacturing just as much or more as it is in software.

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