Couple of questions... 1.) Is there a way to determine the pickup wind before installing and listening for it to be in or out of phase? If mixing and matching brands, 2-A) In order to be hum cancelling a pickup must be BOTH reverse wound and have reverse polarity from whatever it's paired with, correct? 2-B) Is there a difference in sound between Reverse Wound w/ SAME POLARITY and SAME WOUND w/ Reverse Polarity? Thanks!