Well, from memory Navtech recommends that you pull the rod rigging and have it x-rayed EVERY YEAR! Not many folks other than serious racers do that, but really, at the age of your rig I would want a good check before trusting it.
Rod rigging is good stuff... usually made from Nitronic 50 alloy which is pretty immune to crevice corrosion
and the other ails of 304/316 stainless. None the less, it does sometimes develop cracks, usually at the terminals, and when it fails it does so suddenly and catastrophically.