Does your boat have the original standing rigging? If you replaced yours, what prompted the upgrade?
I replaced mine last year. It was all original 40 year old standing rigging. It still didn't look bad at all, but its what you cant see that will get you.
True words spoken, it is what inside the cable that is failing first. We do a fair share of replacement rigging. We tell our customers that if a fitting or wire fails, 9 out of 10 times the spar comes down. When that happens the boat is a total loss because the cost to replace that spar is to the moon.
Heaven forbid it falls on someone. We have a customer that is being sued because of that. He had a unadvisable repair to the mast after the travel lift (boat in the hoist backwards) drove away and took the spar down. The repair failed within a half dozen times out.
The manufacture of the turnbuckles that the 365 came with from the factory removed them from the market 20 plus years ago because they have a bad habit of failing at the hex center nut. My inner staysail turnbuckle did that the first year I owned the boat. We also lost a J22 rig because of one of those wonderful "defective" turnbuckles. The starboard cap shroud center fitting failed and the spar bent hard over right at the spreaders.
Standing rigging is not cheap. I would recommend you change out a pair of wires every year. Start with the cap shrouds, then the headstay (which no one ever sees if it is in a furler) then lowers and last backstay.
Dale
Obersheimers
Maruska Hull #40 Ketch