Hi, I am new to this forum but have been reading it for sometime now. So let me tell you alittle about myself.I live in Upper Michigan, surrounded by old mining towns. Been MD'ing for many years. I use a GTI 2500 and it's been very good to me. So far this year I have found 8 halfbreeds (copper and silver nuggets) the biggest weighting 4.5 lbs , about 10lbs.of copper nuggets and a handful of coins, 20 of them silver I might add. I'll get some pictures up as soon I figure out how to do it. HAPPY HUNTING.