I've ordered the rest of the Ragazzon exhaust system today - 60mm flexi pipe and 60mm straight-through centre pipe without the intermediate silencer. I'll wait until the warranty has expired before I ditch the standard cat and fit their sports cat.
That should improve things a little bit hopefully.
I'm told that nothing I've done so far will affect the warranty. Probably knocked a few bob off the secondhand value though. Oh well, never mind.
Got a big thumbs up from the owner of an immaculate Type R this morning. It's good that the car is appreciated.