Thanks Haz -
I was prepared to do the upgrade with any S i bought but have been surprised how many shops are advising against it.
All have said to do it if you are doing the clutch and want to for peace of mind then have it done. But when techs and shop owners who stand to make $$ on every one they replace are saying no need to do it...
One reputable Porsche shop Master tech in Washington State said " we do not believe in stressing an engine with a IMS bearing replacement for fear of what might happen.
only week one with the car and lots to contemplate.
Thanks again to all ...