Stone damage on the discs i was told......more like manufacturing fault i would think though. I do know ceramic discs are very difficult to manufacture and take a long time with plenty being rejected during the process.
You sound a bit like an attention seeker what's the point what you are doing ? he's not asking for a life lesson...he's looking for a recommendation to have his car serviced....
To the OP you might consider Pentacar in Colico in Italy. Bit of a drive but they are the historic Porsche experts of Italy and a stones throw from Switzerland. They also run almost every rally Porsche in Italy (except mine), have a huge parts collection and more competent and cheaper than a Porsche center.
How many EFers have a Porsche or (and?) a Ferrari ? 😳
I have a beat up 22 year old Daewoo....
No Porsches here but a couple of Ferrari