Jtv 89 Neck Questions in James Tyler Variax Guitars / Workbench HD Posted January 13, 2014 I doubt there is another 24 fret neck that will retrofit it, expecially matching the attaching screw holes on the back. You would probably be better off bringing it to a competent luthier and have them "shave" some wood off the back of the 89 neck. Thank you for the advice. I asked a technician exactly that, but the answer was better not risk it, because the neck will sooner or later suffer from the material lost... I am not competent to judge whether this would really happen, but it`s true that I`m afraid it COULD. I have heard though about changing the neck, so I hope someone could help me on that.