I'm in a right pickle over here. 2 years and counting, I have been messing with my turbo without success - the boost pressure rises too slowly, takes about 5 seconds for the boost to reach its desired value.

I have swapped the CHRA for a new Melett one but this hasn't helped either. Yesterday I disassembled the turbo again and noticed that the hot side's housing has been scored by one of the previous CHRAs...
So I'm on the hunt for a new hot side for the turbo, or a complete turbo with some other fault so I can use the hot side from it. My current turbo is 750431, but probably one from 717478 would also work, hopefully the CHRA would fit in it.

So if anyone has any idea where to find one of these, or maybe owns one they could spare, I'm all ears!