I have an old test garden which has silver and clad coins from 2" to 12" deep. I have noticed that the target identification on the Explorer SE is right-on at 7", but begins to give a more ferrous indication at 8", and becomes way left of screen to indicate a ferrous object at 10" and deeper. Do you guys just look at the depth indicator and dig more ferrous-looking targets once the indicator goes beneath half way (12") on the machine? I am still new to the machine, and find that its deep targets still give a highpitched audio signal, but the visual image is not accurate as indicated above. I wonder how many good, deep targets I have missed in the last week by not noting the visual shift to the left on the deep targets. Thanks for your replies.