Transition for different Corridors

[teflon]

Designing a tailing dam I use a corridor model witch changing slope grade from 1:2 to 1:2.5.

There are assemblies and subassemblies with shapes defined for each slope grade, but how do I make the transition from one slope grade to another on? 

In corridor properties I included two regions for each slope grade.

For grading there is a transition function. But the transition for corridor?         

[Murph_Map]

Try the civil3D forums.