Workaround is not still perfect. (or better...my MOI- skills are not good enough)
1.
There are some lines associated which I intended to delete. But I cant do that. Don´t know what I made wrong!?
2.
The red section is not perfect. But I can´t get it better. And the S-Line for a Loft is in peaces and I´m not able to select it to join for a proper lofting.

Help would be good...
cheers, ML