Thank's guys it's not a Nacra sail it was given to me it was fine but it may have stretched. This sail doesn't have the outhaul track on it so I'll try it in the next hole to pull the sail back, I was reluctant to do that as all my reading said to keep it in the middle hole but I can see from the photo's how full the sail is. The jib does a lot of drumming if its not pulled on really tight but when its pulled tight enough to stop the drumming you can feel it choke the boat, is the drumming a sign that the jib is too old? We had a pile of wind about 2 hours after that photo and I found it hard to point or have any speed up wind.