Hi lyes - it's not really possible to do that just in a script, it needs some more of a back end curve fitting engine exposed that the script can call into to rebuild the curves.

That is something that I want to add, but it may be a little bit before I have enough time to get to it though because so many people have asked for an object organization mechanism which is going to be the next thing I focus on for a while.

Thank you for the animation to illustrate it - that definitely makes it clear and has some good ideas in there, I will take that into account when I get a chance to work on it.

- Michael