I got an answer from Atik. The support is fast. Here is what they wrote :

Hello Sébastien,
Many Thanks for your enquiry,
I consulted internally about this, and apparently it was the original size that was wrong, the more recent one is actually correct.
I believe that it was wrong in the original advert too.

Conclusion, everything's fine. Something was wrong with the driver provided by Cloudmaker. I had to throw my master frame to the trash and create new ones.

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