Does blanking the EGR with a solid plate (2mm ish) cure the smoke?
Double check the actuator arm moves fully to the front and rear with no
resistance at all.
I've only run with the vacuum on the EGR disconnected so far on new EGR (assumption closed), and that was a massive difference.
Reckoning there will be some build up of carbon on the variable vanes. Each time I've taken the clip off yesterday and today it's moved well enough end to end. Don't doubt it's needing cleaning. It's on the list of things to do after MOT pass.
Will get a chance to measure boost / fuel pressure / rpm and share that tomorrow.