I'm getting a pair of Nordstrands J's for a six string. I already have Bart Js. Originally I wanted to replace the barts all together, but I was contemplating having both installed together in my bass. Besides being able to select tones from the Barts and the Nords, would there be any other advantage or disadvantage to having 2 sets of J pups in a bass? I haven't really come across such a pup configuration.