"Build only as much as you can personally handle yourself - and let your clients be few, but satisfied." Those words were spoken more than 80 years ago by guitar maker Hermann Hauser, and today his grandson still follows them like a creed. He continues to build high quality concert guitars - an example of which has even made it into the Metropolitan Museum of Art in New York. The list of famous artists who've played them is long, so we paid a visit to the Hauser business in southern Bavaria for our series Perfect Pitch.