Thank you for your feedback Booleano.
Our exchanges allow progress. If I offended you by my remark about the fact that the spring must not bite into the wood, I want to tell you that I had not downloaded your file when I wrote this. but if that was the case, I apologize to you.

Well, that said, for me too sweep (tuber in French) did not work (I had aberrations). By using "ReconstructCurve" and playing on the number of points, Sweep works without changing the scale (well for me of course!). Your suggestion for a change of scale (x10) is interesting, maybe a MoI3D expert could give us some information on this subject.
I find that the two scripts "Rebuild" and "ReconstructCurve" are very interesting and very good at solving problems of aberrations during casing (Sweep), among others.

> this would be wrong in the real world. A teel wire would break when bending.
I accept with humility your remark which is well founded.

Boileau:« Hâtez-vous lentement et, sans perdre courage,
Vingt fois sur le métier remettez votre ouvrage :
Polissez-le sans cesse et le repolissez… »

"Hurry slowly and, without losing heart,
Twenty times on the loom, hand over your work:
Polish it constantly and repolish it… ”

- Zooen