I hired a rigger to do some repairs at the top of the mast. Before he went up he inspected the rigging. What he found was the stem fitting/anchor roller was crazed with mico cracks. When he removed it part broke off. I was really lucky except that I need to have a new one fabricated. I wish I had taken some pictures. I do not race or sail the boat hard and the cracks were very hard to see unless you knew what to looks for. You might want to dye test your fitting.