Found several nuggets in W.A in open holes presumably from older machines.
Another small area 4mx4m with an open hole produced some 60 odd bits for 20+ grams in small spiky reef gold that the poor 4500 user couldn't hear - no missing it with the Z and sdc
Another odd one was a time I pinged two nuggets in one hole, creeping up on one was the typical high-low but then as you crept on it it inverted to a low-high warble. Had me scratching my head until the first nug came out and after cursing at the size of the little half grammer that popped out a quick recheck of the hole a deeper inverted signal was still present and out came a nice 2+ grammer
Another small area 4mx4m with an open hole produced some 60 odd bits for 20+ grams in small spiky reef gold that the poor 4500 user couldn't hear - no missing it with the Z and sdc
Another odd one was a time I pinged two nuggets in one hole, creeping up on one was the typical high-low but then as you crept on it it inverted to a low-high warble. Had me scratching my head until the first nug came out and after cursing at the size of the little half grammer that popped out a quick recheck of the hole a deeper inverted signal was still present and out came a nice 2+ grammer