I tried those safety pins several years back. The starboard one fell out while sailing in about 15+ knots of breeze. The pintle fell down several inches causing the rudder casting to flop over 45 degrees and chip the gelcoat. It wasn't easy getting it together and back to shore. Since then I use a split ring with a curved end that makes it easy to attach and remove. I haven't had a problen in 10 years.