Will Lee metro truss rod?

Was it Graphite ?

While graphite rods can technically be considered truss rods they would generally be called stiffening rods. If you refer to the picture below the truss rod is the blue piece in the middle of the neck. The stiffening rods, possibly graphite or CF, are on either side.

No idea what kind of truss rod is in the Will Lee. Single acting, single rod wouldn’t surprise me.

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