I got a custom 12k Phat Cat bridge and it was pretty nice. Like freefrog said, resonant frequency shifted down, a bit darker compared to the stock 8.5k bridge. To me the same beautiful character tho, just less strident and a hair darker and rounder. So no, it's not just a noisy humbucker. All the other characteristics remain the same. Single aperture, no series wiring, more precise, twangy, and single coiley still.