I have had my AT PRO for about 5 days and have about 24 hours of use with the 8.5" DD coil. I live in SE CT and It seems to struggle on the wet sand and is nearly unusable in the ocean due to crazy noise and detects. Fresh water lake hunting went well and also dry inland dirt detecting. Found a nice Standing liberty quarter at about ten inches in an area I had previously hunted with the ACE 250. Did I make a mistake thinking this machine would work for wet sand and ocean. I have tried lowering sensitivity and manual lowering the ground balance as recommended without great results. I have been mostly using Pro mode. Any thoughts are appreciated.