I'm glad to still hear some posts about the good old Quatro, which I still have. It's still a great detecor in my book. Sounds like your "running hard" on this, and goin' for the "gold" as they say. What I mean by that is, your being a little catuous not to run your sens to high at first, feelling things out, and also doing a smart thing by putting together a test garden. You know, I don't see this hobby or endevor, or whatever you want to call it any different than anything else. When you want to be better at it, you "gotta train for it"!!!!!!!!!!!!! Good goin', and your headed for the gold, for sure!!!!!!!!! (Oh, boy, I may have over done this post with you Okie Logic), because you sound like a pretty experienced detectorist, but I still think we all need to practice, and constantly fine tune our stratagies!!!!!!!!! Marc