...I've got a Tesoro Mohave coming in (after using the Minelab 305 last year, and the Tesoro SilverMax a few years back)(oh, and also a Teknetics EuroTec--arrggg)...the Mohave has a Ground Condition switch, and I'm curious about mineralization in southwest high desert (specifically central NM)--is it generally high or low mineralization, though I realize there's quite a varied geology in NM? PS: chose the Mohave from Tesoro's lineup because I figured a new machine equals new and better circuitry, and ditto the Epsilon 7" coil. What say?