I have an acoustic Harmony "Batwing" H8025 on the bench. Went to adjust the truss rod and found an unusual amount of threaded rod protruding from the nut. Turned the nut and the rod kept coming out through it—obviously not connected on the other end. Pulled the rod all the way out and there's no breakage or twisting on the heel end of the rod, nor even clear evidence of a broken weld where it might have been attached to an anchor bolt or second rod (I know Harmony used a two-piece compression rod on some instruments). The nut washer won't pull out easily so I can't tell if there's a second compression rod behind it. Does anyone know how these were constructed? Thanks!
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