So to close the loop. The V1 neck tenon is a little smaller and needs to be enlarged by a technician. A small extension needs to be added to the octave mechanism and then it's all systems go. The tone is slightly better but to me, not significantly so. ThanksThe 82z G3 neck fits the YTS-23 but the octave key needs to be reshaped slightly. Made the 23 sound much richer, fuller, darker, with excellent intonation. A keeper mod.