Okay, so I finally have a non-Master Volume amp - I know, welcome to reality. Anyway, I am - for the first time - actually using the pots on my guitar with some regularity. I know that the old Sprague Bumblebees are supposed to be more musical than recent, more efficient caps. But how can I tell if my guitar needs upgraded caps? What specifically should I listen for? Is there a "trick" where if you try to get Clapton's Woman Tone and play a certain note and it sounds flat and doesn't sing, that probably means time for an upgrade? Clue me in! Also - would an RS kit be sufficient for this?