It's amazing to me, all of this. I have played around quite a bit with it all....pots, caps, pickups, all of it. So many engineers I know are so caught up in their educations and what they learned in school. I know many who could build a watch, yet fail to be able to tell you what time it is. "I know all of these big words, and I went to a fancy school, and their books and teachers said so, so, this is the way it is! (foot stomp)". Education is great, but many times, I will take the advice of people who have been there, done that, and had their hands dirty in the process. There are most certainly differences, and very discernible ones at that, in all of the things mentioned in this thread. I couldn't care less about which flux capacitor or widget makes a theoretical difference in a text book. I play guitar. Like many other MUSICIANS, I have learned to trust my ears. My apologies to most (not all, but most) of you higher educated, more holy than thou engineers and scientists out there. Rant over.