Thanks guys,

I have been having a bit of a drive since I got the new 3" dump pipe and the car is definitely more responsive. I'm pretty sure the turbo spools up quicker than before.
EGTs are high - maybe these are normal figures on a CRD but when I'm cruising at 100Km/hr on a level ground, I see 350C or so but even at a slight incline (with cruise control on), the temperature quickly rises to 450C or even slightly more
At the same point, boost sits at 10Psi and climbs to 14-16 during those inclines
If you take off and accelerate hard, you see sharp boost spokes up to around 20Psi but these are instantly knocked down to the average boost for that speed/load combo. Must be the ECU doing its job

Mudski, thanks for the comments re the pipe. Won't I fall foul of the inspectors if I don't show a muffler in the pipe at all?