Thank you for the info so far, i Am in South Africa, North Sails are contracted by Hobie for the class legal sails here. As you will see from the pic, Batton 1,2,3 hook shape, this was on the beach completley rigged with no batton tension and sheeted in. Yes there was very little wind on the sail BUT more wind does not seem to open the slot at the top much more, it has a hooked shape to me compared with my other sail. I don't have a pic of the other sail but i can tell you that the first 3 battons would be almost straight compared to this. Have i got a badley cut sail from North do you think?