If a target is 6" / 7" or less I can pin point it without any problem. I use the Pro / Zero mode and Sensitivity at Max or 1 or 2 clicks below max, depending on chatter. I don't mind some chatter. I also use the standard 8.5" x 11" DD coil. If the target is deeper than 7" the pin point signal drops down to very "faint" to no signal at all. Is this normal? Does my Pro need a checkup? Thanks for any advice. Dave.