Hi Sean,I think you are talking about the twin luff.What I have to stop the rattling is like a tiny sail made out of an old sail with a luff of about 8" and a foot of about 14" tie a piece of cord to the tack about 7 feet long with a loop on it which goes over the tack horn a small loop on the head for the halyard and an eyelet at the clew with another peice of cord to reach the spinnaker pole ring which you move up the mast track so that you are getting a straight pull on the anti-rattler.I have a plastic hook tied to the cord to hook on to the ring which saves you having tie it and untie it all the time make this quite tight you will have to experiment to get the right tension to stop the rattling.
