Yup, I know the six to eight string basses, with necks as wide as the Dan Ryan Expressway, often have something approaching three, four octaves across the fretboard, but how often do you find a double octave 4 ebg neck? I have one on a Tune bass, a Korean copy if a pretty good Japanese bass. I like the vertical ascension although arguably same effect/sound going across 5th through nth strings on wider neck. Called my tech guy and he quoted $1500 to build body and guts using the Tune neck....seems a bit steep. Anyone else know of a two octave 4 string neck?