There is a lot of talk about 2 tone ferrous.As a Safari user anytime we go to Relic or All Metal we are in 2 tone ferrous or am I thinking wrong on this?The only real choice in these programs is to select trash density.We really do not have a choice but to hunt in 2 tone ferrous.Am I wrong in my thinking.What advantage does the e-trac have over the safari in 2 tone ferrous?