Most detectors have an all metal setting or you can knock out all disc features so they all will find gold...technically.
I have found gold from iron to low zinc, but it does come in even higher if pure or big.
I can't dig everything anymore, I wish I had your stamina and patience but I lost that awhile ago.
To compensate I studied my detectors hard and also the behavior of gold to even out the odds as much as I can because I do use disc.
It isn't a lot in the long run, gold is the ninja of all metals and an expert at disguising itself, but pushing my chances over to the positive even just a little is a victory.
In th 5 years I have been doing this I found about 8 or 10 gold rings when I dug most trash, about 25 after I quit digging every blasted thing out there and took a more scientific approach.
That is the great thing about this hobby...everyone can enjoy it doing it in many different ways.
My advice...get something you enjoy standing behind and swinging.
If you roll over gold with almost anything on the market, (shallow gold, anyway), and you do dig everything you will find it.