Newbie with an Ace 250, maybe 40 hours of hunting so far, mostly San Diego beaches. Haven't found a ring yet, I know it will happen, but I want to maximize my chances. Should I wait for "minus tides" to maximize my exposure to the area where folks have been swimming? Look for holes and channels in the sand at extreme low tides? Also, I've got the standard 6x9 coil and wonder if I should upgrade to the 9x12 to increase my search footprint, considering beaches are big and rings are small. Thanks for any input. - ziphius