How much of an impact is there to upgrading TONE pots in a Gibson SG or Les paul? I've been upgrading my Gibsons, and I've done full 4 pot upgrades with RS Guitarworks parts. Would I be just as well off if I only changed the stock VOLUME pots? I'm just thinking of leaving the tone pots alone to save some money. Are the Gibson stock tone pots that much worse than a standard 500k CTS? Thanks.