No this is just a straight forward vacuum capsule.
I have messed around with this quite a bit now, checked exhaust back pressure, fuel delivery rate, air mass, boost pressure sensor, temp readings, and I've pretty much exhausted my knowledge and I'm out of ideas. I've even started from scratch with the basics and gone back through it as a fresh job just be 100% I've not overlooked something simple. I now have the turbo back off it to be returned today to be checked again.