Hi Pilou - for sweep you could use "auto place" mode for the sweep.

To do that, you have to arrange your profile curves to be separate from one another in left-to-right order. You don't need to make them spaced exactly properly, just make it so their bounding boxes are distinct from one another instead of overlapping, so instead of having them like this:



Move them to be like this:



Then you can use that for sweeping, the profiles will need to be outside of the bounding box around the rail path for auto place mode to be enabled as well.


The other way you could do it is to just move them in slices (just position them directly since this is just a simple move and not so difficult, or use that move curve to slice script), then run a line down the middle and then use Flow, the line down the middle being the base curve and then another path as the target curve:





So with that method you again need to separate the pieces into slices so that they have have a different individual station along the base line, then Flow can be used to take that position on the line and evaluate it on the target curve. But this way all you have to do is a basic move to separate the slices and then let Flow do the rotation for you.

- Michael