Hi Eric and all,
I think I have experienced all or most of those detecting "hazards" so to speak, either in AZ or here in NV during the year I have owned my GS5 and the unit certainly performed quite well..
There is some serious $$ to be made in Australia with your GS5b. Here is one small example: During my last 3 1/2 months in Leonora, W.A. I got to hunt with an Australian fellow, who had been at it since 1978.. One can only imagine how good at finding nuggets this guy was. He was using a SD2100 with a Coiltek 14" DD round coil at the time...
Anyway, one evening in camp, he told me about a spot of ground the size of a dining room table he had found during the Australian summer, that was so hot his detector was just screaming, but there were so many nuggets in that spot that he could tell (barely) where to dig. He filled all his trouser and shirt pockets with nuggets and had only penetrated a couple inches of surface..
Being without water for some time, he left for his pickup and decided to go home and try to get ahold of some blasting cord and then go back during the winter time. He told me that if I was coming back the next year, he would wait till then to go back.. A good Mate...
Just imagine what a GS5b could have done in that type of ground and there must be many small spots like that all over Australia.. I recently read about some ground that Chris Hake mentioned, which was too hot to detect properly..
Just the tip of the iceberg..
Cheers, - Jim -