Hi, I'm tooking at adding a humbucker to a far neck position of a Jazz Bass. I'm looking at the W4CBC Bartolini. I was planning on adding it as well as the standard jazz pickups to provide a greater range of tones. I'm quite worried about losing the tone of the two usual pickups on their own however, so I'm looking to have a push/pull pot so that I can turn the humbucker off when it's not needed. I'm gonna try it out on an Shine Jazz bass copy first, and maybe if results are good try it out on my Geddy Lee Jazz, however I REALLY don't want to mess up the tone on that. What is your opinion of this? Would adding a new pickup make the current jazz pickups have an lower output? Thanks for any advice/opinions.