Probably everyone knows this but me, but I recently received my Rolly Tasker sail from Sail Warehouse, and have a question. Along the entire length of the leech, there is a lightweight line, with about 2 feet of line hanging loose on each end.What is this line for?We have only been sailing for about 3 years, and have not learned everything yet.By the way, Sail Warehouse is a great place to deal with. Good prices, fast shipping, and had my sail in stock.Thanks,Sam