I just lost the port shroud on my M-15 while anchored out. The wire pulled right out of the swage. There was no sign of trouble but I imagine it was corroded inside where it doesn't show. I haven't had a chance to make a really close inspection yet but I don't know what else would cause that sort of failure. The mast seems to be intact but the cabin top where the tabernacle was mounted is torn up a bit. The mast twisted the tabernacle out of the fiberglass when it went over. The repair work doesn't look too bad and over all I'd say I got off lucky. Sure was a bad feeling when I saw the rig over the side. As I walked out the wharf to catch a water taxi I kept trying to spot my boat until finally I realized what had happened. I'd suggest replacing standing rigging on general principles every decade or so. I imagine magnafluxing would cost more than new rigging. I have no idea how old my rigging was. Norm Lane M-15 #397