This is a great article telling a little of how Nagahara flutes are made using CNC technology.
“The greatest flute players in the world strive for a uniquely personal sound to the way they play their instruments and interpret each piece of music. For this reason, these professionals often choose hand-made instruments that enhance these artistic efforts. Nagahara Flutes is a company that caters to the needs of top-ranking flute players. Its customers include Sir James Galway, Ian Anderson (singer and flute player of Jethro Tull fame) and many leading performers in orchestras worldwide. The individually crafted instruments are produced in silver, gold or platinum.”