I've got a set of Ultra Jazz 5 pickups and from pics I've seen of the 4 string pups, they're supposed to have flat polepieces. These have radiused polepieces like the Sadowsky humcancelling pups. Is this just with the 5 string pickups or did they change the 4 string pickups too? How close are the 5 string pickups to Sadowskys? Just curious.