The most important new feature that I feel has been added to the X70 for dealing with iron, is the machine's ability to ID targets in real time while in the pinpoint mode. I use disc patterns with iron rejected most of the time on all the X-machines. Therefore on an X50 when a 45 presented itself, I found myself going to pinpoint to center up on the target, then back out, then engage All Metal to look for negative numbers, to see if they were combined with a 45. This was a lengthy and annoying process, but otherwise having to run the X50 in AM in trashy areas was even more annoying.
Now with the X70 life has been greatly simplified, see a 48, click on pinpoint. You center up on, somewhat size, and see the ID in "real time" as you center over the target. So you can see the target wrap in real time in pinpoint mode. Much faster, much easier, and much more accurate.
Now for a bellybutton attitude about the 48 indication on an X70. On saltwater beaches that I frequent, especially after storms, there are thin iron/steel flakes that litter the beach. They range in size from dime to quarter and are usually roundish or squarish. These blasted things read as high coin on just about every machine I use. But on the X70 in AM they will consistently wrap from -8 to 48 with every pass of the coil, a tell tale signature. I don't use pinpoint in this instance because these are widely dispersed targets with nothing nearby, so AM makes short work of them.
HH
BarnacleBill