Broken Turnbuckle

[rjbaren]

A dockmate noticed a broken turnbuckle on the port side lower shroud. One of the sides was cracked all the way through and opened up as it was under tension. I believe it is a Stainless turnbuckle, and I recently put stainless steel split rings on all the turnbuckles and through all of the clevis pins. Did I do the right thing removing cotter pins for split rings? The failure was adjacent to the ring.
Could I have lost the rig if the turnbuckle gave out completely under sail? I have a double spreader rig on a 38 Cheoy Lee Pedrick.
Thanks,
Rick