[quote=klozhald]80% of your power comes from the leeward side of the sail. Don't worry too much about the windward telltales. The middle sag is common with older sails. If downhauling the sail is difficult, you may need to replace the bolt rope to allow more. The rope inside the sail shrinks over time and will not stretch out enough to let you downhaul hard. Lay the sail on the ground and see if the luff lays perfectly flat, or is it curled up a bit. You can pull one end of the cord out by cutting the stitching, and sew on an extension to the current one, then tie the top to a tree and use your mainsheet to pull the foot hard to suck up the extension. Cut and sew the extension while the tension is on but you have lessened it a bit to allow you to work the needle through.[/quote]
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