Explorers are excellent old coin and silver machines. I use mine on the beach for deep coins and jewelery .... but it will miss the tiny deeper gold targets. They are a fast recovery machine but you can almost not move the coil and still get a response. Working trashy areas require listening more than looking at a screen and you have to hunt it slow.... kind of like your are painting. The smartscreen will give you lots of information even on those really deep targets. Its a pretty versatile machine.... relics, coins, even the dry and wet sand of a beach. The standard coil for the II is said to have been the best made... but now with the Pro or SEF they are on equal playing field. As far as ML not working on the older machines..... right now they have only discussed the XS the machine before the Exp II. It was said they will work the XS as long as they have the parts.
Dew