so I have an SD QP Jazz V neck pickup left over from a project that I sold a few years ago. I am thinking of getting a bridge QP and popping these into my VMJV. I read on the SD site that they are sold individually or as a "calibrated pair"....since my pair would be manufactured possibly years apart, should I worry about "calibration"....or is it all just BS...a QP is a QP...?