Ha, well if the manufacturer rep THEMSELVES doesn't recommend their own unit for certain beaches (despite the name "beach" in the title of the unit), then ....... that's pretty telling. I mean, you'd expect them to want to rack up sales, so if they poo-poo a machine of theirs (albeit just for a select geographic, or type-of-sand/minerals), then it should give anyone pause to do it.
They're right: the machine , despite it's catchy name, is not suited for wet mineralized salts. Perhaps white sand beaches , versus cinnimon colored sand (which evidences minerals) .
As far as their recommendation that you go with the Whites Duel field: that's fine, if you're at a touristy clean beach that lacks lots of nails. But .... heaven-help-you if you got on a storm eroded beach, where nails were in abundance after mother nature reveals easy-targets for the pickens. And as far as their other recommendation for the MXT, no I would have to disagree with them on that. It is not a good wet sand beach hunter. I mean, sure, it'll work, but you'll get your b*tt kicked , depth-wise, by machines like the CZ's , excal's, explorer's, etc... If you want to stick to Whites brand for a wet sand beach hunter, a real good one to get is the 6000 Di pro. Make sure it's the "di pro" version (the last of the 6000s in their evolution). If you can get one on the used market, they are very good on wet salt. However, depth-wise, the CZs, excals, and explorers are going to go a tad deeper though.