One tip on the sock we use with the melges with our race sails - we "loose roll" the sail - basically unfurl it a bit just to the point where the sock can barely fit on. Two benefits:
1) less tension on the material, reducing the tendency to develop a "hook" in the luff
2) at least on ours, when to sock is full of sail (no slack material), it wont flap in the breeze.
We also "reverse roll" the sail every other week, although not so easy on a big J #1.
-dan
