Just thought I'd let everyone know.
I've just got my car back on the road having fitted a Turbo Dynamics MD375 (Stage 1) Hybrid turbo. (As well as doing the timing belt and uprated clutch).
What a difference it makes with the standard mapping.
In the past the engine seemed breathless above 3000RPM, now it seems to rev as normal to 3000 and then take off all the way to 4500.
I am so looking forward to getting the exhaust changed and an ST3!