The main on my 15 foot boat has a chord in the luff which goes in the groove of the mast. It seems like this chord has shrunk causing the sail to be wrinkled at the luff. It also makes it a lot harder to raise since the wrinkles make it a tighter fit in the mast. If I lay the sail out on the grass I can definately see that the luff is short and it won't let the sail lie flat. I guess I am wondering if this is normal (done on purpose) or if the rope has indeed shrunk. The sail is stitched thru the chord so the only way to fix would be to remove the stitches, pull it thru, add some rope and restitch. Is it worth it and would using it as is degrade performance? I would estimate the luff would be 6" longer if repaired.