Where did you hear that about the coil?

I really like the X-70 for what it is. It is not a replacement for my 3500 or my 2100 but it is a nugget slaying detector. I was field testing it and started using it to test a few areas before strapping on the GP while I was traveling a lot in gold country where I did not have a lot of time to hunt. It worked great and I found gold from Oregon all the way back home here to Arizona.
The 18.75kHz DD coil is heads up a far better coil for nugget hunting than the 7.5kHz C that comes stock on the machine. But I am sure you had already guessed that one by now. I like the detector and it does exactly what it was designed to do. I will not be surprised if it is the number one selling serious detector by this time next year.
I put the machine in the pattern II of the coin hunting mode before I go to the prospecting mode so I can easily toggle back and forth to check questionable targets as rare as they are and I use the Iron Mask set at the factory preset of 5 along with using auto balance and tracking over manual balance. It is light enough that I can swing it for hours but have to watch myself at times because of that as well I am so used to the heavier machines that I sometimes catch myself swinging it a little faster just because of muscle memory.
Yes I know I am biased but hey it works!
Picture is of just some of the gold I have found with the Terra-70