After sailing a few summers in San Diego Bay we have decided that our jib is just not cutting it. They winds here are usually too light. So I have been looking for a used hank on 150% genoa sail. Have looked at Minney's, Bacon, Pineapple, Craigslist and on various forums classifieds. I have the dimensions: Luff 23.5, Leech 21.5, Foot 15.6 but do the dimensions have to be exact?? I haven't found one sail with these exact measurements. Any ideas? Thank!