Keep template drop stations when using corridor reattach or similar feature

Hi,

While using InRoads PowerCivil ss4 i'm trying to attach an extended alignment for an already existing corridor.

In ss2 I could just set negative stationing for the beginning of the alignment, up until the original beginning where 0+000 km would be.

Then all the template drops would stay in place. Meaning the templates were locked to the starting station 0+000 km

This doesn't seem to work in SS4. Here it instead connects every template drop/point control/parametric constrain to the physical starting point of the alignment.

I tried using Corridor reattach but it automatically adjust every template drop/point/constrain, after which I have to manually adjust everything. This is for a huge project devastatingly time consuming.

I then tried to remove the alignment and exchange it with a newly created alignment. 

It has a negative station at the beginning of the alignment, starting station at 0+000 km and same end station as earlier.

Even then it adjusts to make up for the change in length of the alignment.

I then was happy to find out that you could export csv information from every corridor object. But was quickly sad again when I found out that you couldn't import it again...

Is there some feature that I'm missing or missusing?

Can I change the length of an alignment without having to change every drop/point/constrain? Or without having to go back to SS2 and then import the corridor again.

Appreciate every help I can get, this is driving me crazy.

Kind Regards

Lucas Olsson