Stratopod,i too was going through some old news releases from Probe when they used the MMI readings to look for drill targets.They got high reading of copper,cobalt plus gold etc.and later EM reading showed distinctive lobes on each of the two targets.When I inquired about the reliability of these mobile devices,I was told that they sometimes work wonders and sometimes miss terribly.Since the company didn't find much on the few holes that were drilled,they abandoned the project when the disaster of 2008 set in.