Nechville banjos have a neck attachment system that uses a device known as the Flux Capacitor. The neck has a hole in the heel that accomodates the brass tube seen in this photo. This brass tube is threaded onto a screw that attaches to the Heli-Mount frame and the neck and tube mechanism are held together by means of a screw inthe heel of the neck. The Nechville Musical Products Company is located in Bloomington, Minnesota and is owned and operated by Tom Nechville.