This is from the promo for the Martin 00018 Special that is MFs SDOTD (I added the bold text):
>This glued, neck-to-body joint allows the neck and body of the guitar to resonate as one instrument. Like many of the world’s finest string instruments, the mortise and tenon does not have any bolts that limit sustain or change the color of the acoustic sound. The tight fit increases the transference of tone and sustain across the entire instrument. <
https://www.musiciansfriend.com/stupid
>This glued, neck-to-body joint allows the neck and body of the guitar to resonate as one instrument. Like many of the world’s finest string instruments, the mortise and tenon does not have any bolts that limit sustain or change the color of the acoustic sound. The tight fit increases the transference of tone and sustain across the entire instrument. <
https://www.musiciansfriend.com/stupid