Subassembly Composer: Custom subassembly for shoulder

[madumitru1]

Hello,friends,

I made a subbassembly for the shoulder, that allocate a space for a gutter in the situation when the slope of the carriageway send water to the gutter. Otherwise removes this space. The original subassembly was very complex with a lot of decisions so I made a simplified one just to find a solution to my problem.

Now the problem arise when I use this subassembly; the subassembly which is attached to it, jumps to the next subassembly (to the inside) whenever the carriageway is superelevated.

See the attached image which shows a typical example. The slope to surface subassembly which is attached to the shoulder act like in this area the shoulder disappeared. 

Did you encountered a situation like that? And, more important, is there anyone that found a solution?

Thank you in advance for the help.

BR

Marius