Whoa! I would be worried about warbly/chorusy overtones with that much magnetic pull on the strings. I've done quite a few 3-pickup experiments with basses and encountered that issue a couple of times, where I had to swap one pickup out for something with less pull, to fix the issue. Also, my 3-pickup Godin Shifter bass suffered from that issue. I've never tried 4 pickups, but can only imagine that EVEN MORE pull would result in the issue being present and exaggerated, which would be disappointing to come across after spending $4k!