Greetings, I have a 1960 National Baron that is currently all-original. Everything plays and works great with exception of the tone control on the neck pickup. The pickup sounds very dark - almost no high end at all - with the tone control wide open. Turning it down some how darkens the tone even more to the point of being unuseable for me. My question: is this how they sounded originally or is this the sign of a failing/failed tone cap? Next question: should the tone cap be replaced? Will this devalue the guitar significantly? My guitars are pretty much all "players" but I certainly don't want to unintentionally or needlessly harm the original character and inherent value of it. The bridge pickup gets the most action and absolutely kills. Would like to have the neck pickup in better order though... Thanks for any help/suggestions..