Just got my ETrac and have been reading as much as I can. Bought Andy's book and put his coin program on it. I also put goes4ever's TTF program. Is it effective to use TTF exclusively? It just seems like a more simple program and I like that. But, would I be missing coins in low iron areas by not using the 4 tone program? I apologize if I should have read this somewhere already. I have read a ton and may have overlooked it. Appreciate the responses!!