Hey Nigel,
We spoke yesterday at the Valley.
  Is there a chance that a loss of fuel pressure was causing knock on the top end?
If you are interested in the Bilsteins, I'll let them go for $20 apiece.
   If you need any help with any car stuff,let me know. My aunt lives on the east side of Nassau Lake.   I could always stop by on the way to her place.   I mow her lawn,etc..
Talk soon,
Steve  (highmileage)