first and foremost, you need to establish a relationship with your mechanic. He needs to really know how you feel about your car and that you have chosen him and not anyone else with your car. I would never choose a dealership, ever. It should be an independent shop that specializes in these and other types of cars and "it's owners". I think the tech should be an enthusiest as well as an owner of something particuliar himself.
+ 1 !