how many other people are having this problem with this turbo?
If it is just a bit of a one off, i would let the said workshop repair the turbo as SP are asking. Then u can take ur chances with refitting it or paying to have gcg inspect it to see if it is indeed 100%
it might cost u a bit of time and money but this is the real world and its not always nice. warranties or garantees dont mean too much to me, unless i have faith in the product i just dont buy it. that is unless i can afford to lose the money, harsh but sometimes as others have said its best to spend money on proven($$) parts .
at the end of the day i dont have the money or the time, because time is money too, to take companies to court and stuff around like that.
and ive spent my 5c
gl