I have seen the patches in question. By definition they are primary. In practice hopelessly light and I would expect the sail to last 1 regatta at best.
You better go check the photos and then the ISAF drawing of patching, because the SI sails for sure have the .75mil PSA in the position ISAF describe as secondary reinforcement.
Its not on the list for sure, but is it making those sails much faster? any faster? any difference at all?
As for longevity and weight of sails: its perfectly legal to build a mainsail from Apen 6 1.5 mil, how long will that last as a mainsail? Is that a good thing for the class to have?
