many have had the same struggles as there can be a fine line between digging lots of iron that VDI and sound good and digging very little.. in my area back East here I hunt old homesteads that I’ve been hunting for many years with other good machines and therefore the ferrous to non ferrous ratio is very lopsided which is probably one of worst environments to try to learn a brand new machine..in my area I have found in somewhat similar areas I use field 1,or park 1 if aluminum is present,ground balance 15,sensitivity 18,19 or 20 depending which avoids iron best,5tone or 2 tone work best for me,50 tone makes the iron sound too good,start with separation speed of 5,and iron bias of 0 if I can get away with it,I hunt in 15 kHz ..multi frequency just hits too hard on deep iron.. these settings work for me in my area as they tend to be close to optimal for the place I hunt and making the slightest adjustment to dial it in usually works for me..a slight thres buzz can sometimes help for guessing size and depth..in my fields I dig anything that that repeats a clean signal both ways that reads higher than 6 as some flat buttons hit low.. I hunt in discrimination on..my area has cast iron stove chunks,buckets,horseshoes,pindles and a whole lot of whatnot ... listen for the broken edges of those signals as that can often indicate iron that is trying to fool you..also the iron often won’t hit at the exact same point of the swing or will hit hard on 1st swing then not want to hit a second times...gotta train your ears too to ignore those iffy signals that you know are iron..as long as you are digging for ferrous targets you know your on the right track.. good luck..
