Stainless won't stain the sail?
This is a three point sail, the lower two are rings and the upper is a grommet on the sail. The knot on the back of the grommet and the grommet patch pull thru both rings if the tack isn't released at the right time. Multiple crew have had this problem, they forget to release the tack when they feel resistance I believe. The only way to fix it is stand out on the hulls and pull it apart by hand, the sheets cannot pull it out.
Maybe a Ti ring is the answer, can they stain a sail?