This would probably work for the zero rocker trem design though. Does anyone have figures of the amount of neck tension a 12 string guitars neck is stressed under in pounds or kilos? Ive thought about this honestly a few times as a vibrato bar would at least give you the option of smoother vibrato. Playing a 12 string is quite different than six for me. Of course as said you wouldnt have much up pull, but a locking bridge 12 string should have been introduced at some point years ago. Im willing to bet no one has done this because they know that they cannot make money off the darn thing. I would still love to see it!darren wilson said:I don't think anyone has done a 12-string floating/fulcrum tremolo of any kind. The tension would probably kill any kind of knife edge almost immediately.