Adam,
======================
Does the exterra series Id target properly in the all metal mode .......like do square nails come in and are represented by an id number ??
If you mean the ALL METAL option in COIN & TREASURE on the X-70 or the ALL METAL mode on the X-30 and X-50, then yes, you can ID targets in all metal but remember, it is NOT a true all metal non-motion search mode; i.e., it is a motion dicrimination mode with everything acccepted. Might sound the same but for those that use detectors with a true non-motion all-metal search mode, they are two totally different search modes. On the X-70, the Prospecting mode is a non-motion mode but it will not target ID in that mode . . . . . just beeps on targets beneath the coil which is what prospectors want.
======================
Is the lower 7.5 coil better for deep silver ? (provided ground conditions are moderate)
The LF coil is better for the silver and bad ground but the MF coil is a good general purpose coil . . . .
=======================
Do you see one set of headphones to be more adequate for the exterra series than another ?? and if so which do you feel is best ??
I'm sure you will get as many different answers as you do posts. Everyone prefers something different. Hate to say it but I use a low-proced set of Calrad's with the 90 degree plug on the X-Terra's and they work fine. Tried the Depthmaster phones which also did fine, especially in the winter keeping my ears warm. But it's a matter of personnal preference in terms of weight, comfort, response and price.
=======================
Andy Sabisch