Thanks for the additional info. Do you know of a way to rehab this sail? Is it feasible to pull the "magic line" out and replace it with the "no stretch" line available today?The wire is probably plastic covered like lifelines. The actual wire is a small diameter flexible wire but the plastic covering stiffen it. The plastic covering is to prevent staining the sail with rust spots of bare wire. This was a common way of making the luff of a sail before the advent of the near zero stretch 'magic' line. with near zero stretch. Without the wire or 'magic line' overzealous tensioning the luff of the sail would quickly stretch sail into a mess.