I just replaced ours after 9 years as we needed to get someone up the mast and did not want to take any chances. I was mostly concerned with the portion of the main halyard that remains exposed at the top of the sheave when the sail is down and remains hidden inside the mast, unable to inspect, when the sail is up. After replacing and washing the old halyard it was determined it was in very good shape and will go backup as a spare one. I don't worry about the headsail halyard as if it fails it can be easily replaced by going aloof. We had the strap on the top of our headsail break mimicking a halyard failure and the sail did not drop down and we were able to furl it. Went half way up the mast and with a boat hook was able to catch the shackle and bring it down. The straps and UV cover were replaced on the sail.