spine is an effect and has nothing to do in building a spiral wrapped rod. i personally still spine mine, but many rod manufacturers only build on the straightest axis on all rod types. the primary advantage on a spiral wrapped rod is no blank torque, which is typical on standard casting/conventional outfits.
if you want a demo, stop by the saltwater edge's booth at next weekend's risaa show and i'll have a few spiral rods there.
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