Bit of an update.
Done about 500 kms and used upto boost setting two. It has no problems coming out of a second gear corner at 5000 RPM, get on it and turn tyres. Can't wait to try setting 3 .
Car is going back to get the shims readjusted after it's cam and retainer change. It seems to have all settled now and it has one or two noisy ones. Bastard! Rear diff is booked into get its rear diff sorted on the 27th.