Cheers James, not an issue re -gate as was flap-gate on a .63 no cracks either. have changed turbine housing Garrat where this issue might arise!
Getting her mapped next Thursday , will post.
I was reading a post from your coleauge(Stu) re actuators which confirms my belief re control when there is none(Use a -34 as anything above 15psi is useless on a -31) .
Why would you have to bleed off more than ness to achieve zero!
Make's sense to me, will find it and referance it.
Not tonight thought tired!

Thank you for your help, Cheers, Tim.