If you make it to Germany, visit the Ruf Workshop. A very nice 1.5 hour drive southeast of Stuttgart about halfway to Munich.
I stopped in unannounced and they walked me through the entire shop and I even got to see the prototype 2017 CTR. What a beauty. Across the street is a combination authorized Porsche Service Center and Ruf warehouse with several hundred cars waiting to be repaired, restored, or modified. I even got a nice DVD on the history of the company.
A very nice older gentlemen and his wife spoke with me for quite a while. It wasn't until I got home and watched the DVD that I realized it was the Rufs. Very neat and friendly people throughout the workshop.
