Has anyone run across a Portsmouth Number (PN) for an S2 5.5? I have checked the US Sailing site without any success. As one of the S2 Grand Slam series I can't imagine that the 5.5 was not rated as some point in its history. It measures very close to the Precision 185 which rates at PN=90.4. The 185 is lighter and has slightly less sail area. I would suspect a sailing club in the upper midwest would be the most likely location for a PN for the 5.5, but who knows? Let us know if you can document an actual PN for it. Thanks!