I was a customer of Callas a long time ago. They serviced and maintained my 1995 993 Carrera S and we struggled with faulty lifter problems, together. They couldn’t have been cooler, or more supportive and knowledgeable. They worked on my 2004 GT3 and it was perfect every time. I just recently got back into the 911 world and took my 2012 991-1 to them for some specific tweaks, and they delivered once again! Sometimes you have work done and you can’t feel the difference. This car is worlds better! These folks are the real deal. Thank you.