It's a good aid for getting the best optimum cartridge set up possible for any given TT arm and cartridge combo any one has, a good tool for changing a new cartridge but it will always be a challenge to get it just right, it cant be done, do the set up as best you can and as the other poster said, enjoy the music, i just use a good protractor and my ears and experience to set my cartridge, i know what sounds right and what doesn't.