Hi Pilou,

> In the 2D view I can see now "start / end" for choose
> any that I want flip or not ;)

But this will only be true if you had them all in the same orientation to begin with.

If they were all in different random orientations to start with, those markers would not help you because Sweep maintains its own internal flag for whether a profile was flipped or not to get an untwisted result - Sweep does not just automatically use the natural orientations only. Meanwhile those markers are put on the natural start point.

- Michael