Thanks for the reply Paul.
I had ended up with a nice (kind of) workaround without having to convert to poly and loose the easy editing in RC.
I had realized that for all the places, the ending element is the same geometry, just have to be mirrored around, so I just moved the slopes in the clipping area in
and added the ending geometry using the free Clone modifier, so it ended up pretty nice, light and easy to modify.
I thought I will let you know if it can help somehow for the development of this kind of feature (or maybe someone facing similar problem).