"...what did you mean when you said not to underestimate the gold setting on the MXT

Would that perhaps come in handy for coin shooting

"
Use the
prospecting mode (it's rightful name) for coinshooting? I dont think you'd like it, although I know of one fellow who uses it exclusively - as you might guess, his gold count is higher than most dirt diggers. What you may learn to like about it, though, is that it will let you learn more about your soils than you want to know! People assume that gold detectors are only VERY sensitive, so thats why they are good at finding nuggets. Not so.
More importantly, besides being sensitive, they are also configured to deal with extreme ground mineralization and give you features to overcome it. Maybe a little intro into gold is in order.
See, free gold like nuggets comes from igneous geologic sources. Essentially, this means volcanic upheaves. This sort of geology is loaded with minerals and alkalis that can overwhelm even common detectors like coinshooters. You've heard all the howling over ground balance and mineralization, "hot rocks" and so on, right? This is the source of the aggravation.
So now, you want to find itsy-bitsy gold nuggets in the worst sorts of these 'hot' soils?? It does little good if you whank out the receiver gain to find pinhead gold nuggets, if your detector cannot track and overcome the shifts and blooms in ground matrix minerals that are often encountered in gold fields.
Units like the MXT and its parent the GMT have features that allow for extremely fast ground balancing
and tracking of changes in these soils, should it be needed. But, they also give you feedback to tell you what you are working with beneath your coil when it gets bad.
Okay, so you dont expect to use it, but what if you understood things better because it was there? What if you said, "Hey I have the feature, so why not go on a little vacation where I can use it and open a few new horizons?" Wouldn't that be worth having? What would your GF say to it?
Keep in mind that the MXT was created to be good at THREE things:
- Coinshooting
- Relic Hunting
- Prospecting
How much would you expect to pay for three SEPARATE detectors for each of those activities?