Hi Petr,

> -both curves are planar
> -both curves are lying on the same plane
> -one of them is completely inside the other
>
> What do you feel about it, Michael?

Definitely a good idea! Maybe something that is used only for auto-place mode?

It probably is not too difficult to achieve, I already have a mechanism for determining contained planar regions used for Extrude and Planar.


> edit: And generally, if there was more than two rails selected, MoI
> would sweep a profile(s) along each rail individually. It would allow
> "handling a larger number of curves at once" :)

Yup, I was thinking about this one a bit too. It's slightly odd in that there is an exception for 2 curves being the 2-rail sweep instead... But it seems practical enough, I mean if you only have 2 one-rail sweeps to build, that is not such a big problem to repeat manually.

Added to the wishlist.

- Michael