Can the old pots change your sound?...Guitar player i my band changed pots in his Stratocaster-EC and it was huge difference...than he made measurement of old pots and some of them was not 250K but 320K or so...he think it had different calibre becouse moving pots for many years eats that resistor route...do you have to change pots after 10 years(or so on) your instrument?...thank you W.