Ah, so it’s company specific. Read a book, take a test, receive a certificate that says Joh Wayan Is qualified to tune with EMS. I had to do some shite like that in an unrelated field. There still isn’t a specific governing body that looks over tuning on a broader scale. You can’t exactly go to school to learn to tune a car. That means anyone can take a test and become as qualified as a tuner could be on paper?
Usually these tests are a few hundred tops. I