On my first sailboat, my rigging had circular cotter pins. My current sailboat uses normal cotter pins. I read a UK sailing publication and a writter stated he always used circular cotter pins because he has never seen one fail while he has seen many normal cotter pins fail.
So, as I think about this I am thinking of replacing everything with circular cotter pins. Wanted to poll the spiritied group on sailnet on their experience, thoughts and comments. Probably something silly but the article stuck with me.