Does anyone have a ballpark estimate for how long it takes for the eye on a mushroom mooring to wear down to the point it should be replaced? I know there's lots of variables, but I think I'm on the light end of the wear spectrum. I put in a 200lb mushroom 7 years ago with about 15 feet of chain, swivel, etc, set in about 5 feet of water with a thick layer of soft muck on the bottom. Had an Oday 25 on it for 20 months total. Protected spot--the chain would probably lift completely out of the muck in southerly gales only. Replaced all the chain two summers ago and the eye looked good, but this summer my boatyard said they pulled and junked it because the eye was gone. Never got to see the gear and am a little suspicious.