ok I looked at your part, when you make your unfolded, in the "Convert-Volume1" function the folds remain in a state of deletions you have to activate them.
As Frédéric says, it happens that the folded deactivates in the unfolded function. You have to go to the flatpattern configuration then go to the unfolded then reactivity the folds.
The main thing is that @eric9.benoit has his answer, after who gave him and how quickly, his answer...
I would say that you are too old for me:p but I would not allow myself, not knowing your ages! whatever.... Laughing out loud
Edit: Well, we now know that @Ac 427 cobra is 40 years old, thanks to a post at the beginning of the year we also know what it looks like, what will we know next time??? :) Mid 2.48x1/8 Century :D
I just realized that I hadn't come back to the forum. I always have weird things, but for this shot, I managed to get out of it thanks to your advice! Thank you!