No, this system adjusts the up-and-down angle of the entire neck, not just the neck relief (that would be a truss rod). It does this by having the neck, which remains independent and not permanently glued to the body, act as a sort of see-saw, with the pivot fulcrum being a hinge arrangement located near the heel. An allen screw in the neck bears down on a fixed plate in the body below; tightening or loosening the screw even a wee bit moves the neck up and down in see-saw fashion -- and with it the guitar's action. This simple operation can be performed even with the strings under tension.
Greg Smallman uses this system in all his guitars now, as does US doubletop builder Garrett (Gary) Lee. David Schramm evidently uses it, too, in his modern lattice instruments. If you're interested, I think there's a fuller explanation of this type of adjustable neck, along with illustrations, on Gary Lee's website.
Last edited by Intune on Mon Jan 28, 2019 1:14 pm, edited 2 times in total.
2010 Andres Marvi (cedar/Madagascar rosewood)
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