[quote=Dogboy][quote=mikekrantz] YMMV, but I wouldn't trust 40 year old rigging no matter what.[/quote]
Totally agree.
Some damage is very visible - kinks, broken strands, heavy corrosion. Damage from cyclical loading and stress corrosion cracking occurs at the microscopic level and can not be seen, but will also result in failure. Unless the wires sat in a barn unused for 25 of those 40 years, I wouldn't use them. As the previous poster stated, replacing wires on a regular basis is cheap insurance.
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