I've been lurking this forum in the background when I was deciding what to do with my Epi Les Paul Std I picked up for real cheap at a garage sale. Was interested in pickup selection opinions when I found the endless debate on caps. Congrats, you guys are putting all the "guitar capacitor" manufacturer's kids, and their grandchildren through college. Come on, $50 each for bumblebee or vintage PIO's? Besides the fact that Gibson's bumblebees are really cheap caps inside a vintage looking shell, there are other issues to address. Now, before I don my flame suit, let me explain from an electrical engineer's point of view. All that matters in a capacitor is its actual capacitance value - not its construction, voltage rating, size, age, etc. Measuring this value directly is tricky because you need to know the charge it is carrying. This is not easily done outside of a lab environment. Even though caps come in values (.015, .047, ect), all that means is that the cap's actual value is within a certain percentage of its advertised value, which is called a tolerance. This is similar to resistors, which have a separate color band just to designate the different tolerance percentages. For example, a .020uF cap with a tolerance of 10% would pass quality control with values from .018-.022uF. Basically, 5 different .020uF caps can have 5 different actual values, which affects their tone very slightly. All you idiots who claim you can tell vintage from cheap radioshack caps are only hearing the subtle differences in actual capacitance. Applying that concept to the real world: Caps are in guitar circuits to filter out undesired frequencies. So lets take 100 different caps, and measure the values of all of them in a lab environment. 4 out of the 100, even though they are made of different materials, have the exact same value. If you were to install each of them into the same guitar and hook up the output jack to an oscilloscope, the waveforms produced would be identical, because the frequencies being sent to the jack are identical. Now, if having vintage caps makes you feel you guitar sounds better, which results in better playing, then ignore this whole post.