I just got an ESP ltd H-400. It has Seymour Duncan JB/59 pickups. The 5-way selector is not wired to have both humbuckers on at the same time. Can I re-wire it to have both on? Is there anything about this combination of pickups that would make me not want to do this? I saw an alternate wiring diagram on the SD website, but wanted to make sure I wouldn't screw anything up by trying this.