On your new management, how will the ECU know the vanes have moved?

Who is going to map it for you?

In the world of cossies you are unlikely to find anything cheap or easy to do that yields gains that others arent already doing as there are so many people out there developing these engines still.

Stop and ask yourself why no one else is using one on a cossie, is it cause none of the cossie tuners have heard of a VNT turbo? or is it cause they know how much cost is involved in developing one to work properly versus how little gain is involved?