Our Covered Neck Fixing-system is a kind of bolt on construction that isn't - and it's a major element of our screwless back design. To attach the neck to the body we use two metal plates that are clamped into each other. This connection is supported by the string tension. In addition to that there is a metal cylinder inserted into the body thru this a bolt is driven against the neck to push the clamps together and make it a rock solid connection. To tighten the screw, once that should be necessary, you get access to the CNF by taking out the neck pickup and using an Allen key. Soundwise this construction combines the best of both worlds: you get more attack than with a neckthru and more sustain from it than with a regular bolt-on connection.