Did I miss the part where you wanted to keep the automatic link in the first post?
To keep the link create an Assembly with no subassmblies. Add a small region (0.01') in the corridor at the begining and end of the station range you want the feature line linked to using the empty assembly. Then extract the feature line from the segregated region and it will only use the segregated region for the feature line link.
Christopher
http://blog.civil3dreminders.com/
Civil Reminders
http://blog.civil3dreminders.com/
http://www.CivilReminders.com/
Alumni