My jib flaps and sounds like a motor boat or helicopter in moderate air. (15-20 kts.) My sails are old, not crisp. The boat is old too, hull number 2479 I think, but the spars are from a newer boat, black anodized, no comp tip. Should I use a higher hole in the plate in the lower rear corner of the jib or is all to do with how tight the jib sheet is set? I have been keeping the jib traveler cars way out by the corner castings.