I am curious to know how he determined they were close to failure. Did he physically take them apart from the stay/shroud?
The Sta-lock suggestion makes sense only to the extent that one would disassemble, inspect, and reassemble. What type of maintenance is advised during the inspection process of the Sta-lock?
Standing rigging, whether on ship or boat, seems to just get replaced periodically because we just figure "it's due" versus running rigging, which is much more likely to actually exhibit signs of wear. IIRC, every five years on a cargo ship for standing rigging with running rigging inspected monthly and torn down (blocks, goosenecks, etc...) annually.
“Scientists are people who build the Brooklyn Bridge and then buy it.”
Wm. F. Buckley, Jr.