Little update for peeps:
I've been suffering with quite a bad smoking issue with the tubby recently, i've tried all sorts of things (new turbo's etc) but today i think i found the route of the problem
my oil feed and drain being totally custom was completely wrong too! bearing in mind i've had some apparent turbo guru's look at this issue to no avail i'm pretty glad i may of solved it
wrong angles and size, so a little of jiggery pokery and yet another turbo later i'm hoping to of fixed it
once this damn smoking stops i can up the boost to 12-13psi and get some mileage on the old girl before whacking the big ponies and gas through her