Hello everyone! It's been awhile. I am liking the 70, but would like to know if it's totally necessary to put the machine in all-metal to GB. It seems to "go through the motions" when I get GB on menu, and then hit the auto button. Sometimes it seems hard to flip the machine back to mode 1 after switching to all-metal. I have the stock coil and the 18.75 6" one, but if there is a better one for deep relics, I may want to buy one. I've heard a feww good and bad things about the 10" coil, and if it's not much difference, I'll just keep what I have. It blows my mind that the 70 doesn't have an adjustable disc. switch, but in mode 1, it works great against iron!!