Not trying to sound negative but has anyone asked WC what their recommendation is on replacing? I would think they will say 2-3 years max. (just a guess as I haven' t checked with them). Talked with a manufacturer of string material and this was his opinion too (1-2 years) but again neither of us had talked to WC. Again my own .02 but you will still have shock transfered to the string and sooner or later something will go, especially if you can' t get wax under the center serving, etc.