Brian Cleverly wrote:

snip

During a delivery from Hawaii a few years ago I found 2 of the three
cotter rings at the backstay splitter plate had very nearly fully undone
themselves.

After this happened 4 days in a row, and one disappeared from a shroud
turnbuckle, I replaced all rings with pins...

After that I've banned rings on any boat I've had anything to do with.

Heard this same story, more than once.

Have yet to hear of a taped pin coming out.

Lew