I couldn't agree more, Neil, that's why I made the original post. They used a single turntable and, as far as I can read, a single cartridge for the group tests. This is guaranteed not to bring out the best in certain arms as the arm/deck/cartridge need synergy in spades to work correctly. A good example is all Rega-based designs; can sound wonderful or flat and grey depending on what turntable they are mounted.