I had a side stay break in a sudden squall during a race, resulted in written off boat, heaps of stress and a lot of mucking around being rescued. You cant see inside the fitting where mine broke, better to replace them at least every 5 years.

Jeff Southall
Current boats
Nacra 5.8 1703 Animal Scanning Services
Nacra 5.8 1667 Ram Raider
Nacra 18 Square
Arrow 1576