I am looking for a metal detector that in a way can do all I need it to do. I understand there is no perfect machine that can do everything of course... a machine that can do most things built into one machine is a CTX 3030... or a machine that can find anything out there and gold the ATX (perfect machine in my mind better than CTX) my issue is I dont want to keep having to go over the same hole every detector I buy I want a detector that can detect ONCE and tell me if theres anything metal in that hole... I dont want to have to go back use the CTX then go back use a ATX.. I want a machine that is deep enough to tell me there is NOTHING in there not even 5-10ft down. I was told now a Two-Box can go up too even 20ft deep depending on size though? so my quesiton to you the type of "Prospecting" I am wanting to do do you think a Two-Box is needed. I was told the top depth even the ATX PRO can go is 3-4ft your looking at 1900s stuff... what about medieval or even older stuff that's way the hell farther than 5-8ft underground especially if I am in the mountains the terrain is different a little 4-5ft seeker aint finding me jack in a mountain. My main focus is the ATX PRO because it does more than the CTX 3030 and most other detectors and is the deepest seeker.