Had Duncan out the other day to sort out my boost cut issue.
Be explained that its likely to be the target bar is too close to the limit. The cure for that wasn't to drop the target but increase the limit. In his own words my car runs perfectly(slipped that in for the ego boost). My target is 1.3bar and limit of 1.5bar now.
Thanks again to Duncan. He came to my house to sort it and still had time for a little chat!