That was my plan flex, start switching them out a 5 to 6 years, its not cost prohibitive and its good piece of mind. Big downside to the design not being able to see how bad they are internally. A mate has tapped a fitting into the drain hole on his and connects it to the hose after each trip to flush out the inside... Might help a litle bit getting the salt out but I guess you still have moisture in there
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