look into Status auto in londonderry, the've done alot of work on my buddies audi there and I've been there to drop him off/pick him up and I've seen some pretty sweet Porsches there, and he does nothing but praise them. I even convinced my bro to take his audi there and he was impressed with their service... It's a small little shop but they do good work and thats what counts....
-I've got a couple more years before I'll be a "good" Porsche tech. so until I move home check into these guys.
