It seems as if the initial results from Australia are not promising at the moment, still early though. http://golddetecting.4umer.net/t24407-gpz-19-inch-depth-increase-i-don-t-think-so http://golddetecting.4umer.net/t24439-our-air-tests-z14-z19 They really need a US tester going into the future, the prices are too high to buy based only on marketing brochures for some of us now (like me). Problem for me is many reports in Australia are generally from places you must run in Difficu