I've owned a 1973 Ric 4001, with a toaster neck pup, for about 8 years. Over the last copule years the pickups seem to be losing some high end. Not totally dead but certainly not as sparkly as before. I replaced all the pots with 550Ks and raised the pickups as high as possible. I even had the pickups remagnetized. But it still sounds too dark. Is there anything I can do other than replace them? And before anyone recommends it, I am using SS strings.