Turbo dynamics have been in touch with me.
They're replied with:
"Hi Ashley,
We would like to start with the most important issue, the turbocharger is not designed to run 30 psi let alone 35 psi, the turbocharger will fail at these levels, the mapper should be addressing this as soon as possible. We would expect that the torque and horsepower would actually go up with less boost, in our experience as boost levels above 1.8 - 1.9 bar actually achieve the best figures. Anything above this creates far to much heat particularly with the standard intercooler, hence the performance drops."
As you can see, if my boost gauge is accurate - I'm getting 30psi and over of boost. So either my boost gauge is wrong, or I'm packing too much punch which may actually be a power loss rather than a gain and explain why it's gone into limp mode a few times....
And as you can see by this video:
http://s136.photobucket.com/albums/q199/ashleydunderdale/?action=view¤t=Video0033.flv
I'm running quite extreme cases of "overboost."