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.

On top of this I can add that the same cloth is made with a technora yarn. I promise that there is no way that you can tell the difference between the poly and technora yarn. So you have to take the manufacturers word for it. But we don't have to cause it's not on the list. The ****s illeagle.

I've already pointed out that there is no loop hole. The class rules a backed up by the rock solid ISAF rules. You may think you've discovered a loop hole but you haven't. You think this sort of stuff hasn't been thought about before your wrong.