I agree and that is my thought is that the flasher is creating the noise/vibration. I also figure that they are with in the bottom 0-15 feet while feeding and that the flasher will do the attracting along with the scent from bait/hardware (scented) Even if you are within lets say 6-8 feet I would guess that they are going to find your gear within that range and track it down( active feeders).The thing I wonder is it the different noise/vibration from a 12lb ball hitting (mostly mud) bottom that is creating a noise that attracts them from a further distance?