Got the car back last night with my new shiny turbo fitted. The bill came to £935 so I'm just glad the dealer paid for it and not me :P
Car runs soooo much smoother now, and has a lot more pull through all the gears. I was also getting a lot more turbo chatter coming through the induction kit, which I've now got rid of. I got my 888 filter and de-restricted airbox in now, with my vectra pipes (instead of the stupid K+N) so I'm a happier bunny now.
They've also changed this part here, for a black painted one. Is this something to do with fuelling?