I totally agree with Leonard that the Router match the length of the diff-pairs TO good. It´s waste of space to tune the pair exactly the same. It doesn´t matter if you set the Tolerance to e.g. 200mils. The Router still wants them to be exactly the same when using Tune.
Where are you now Andy ?
The most basic is "Differential pairs phase tolerance", now PADS is up to 9.5 but nothing updated. Why your firm still keep your mind at 0.0 mils tolerance ?
I am really disappointed.