Understood - I guess my point is (and why I used the words "what one might expect" instead of "what one should expect"), this sort of thing might happen. Sure, perhaps I was just "unlucky", but the fact is, my ore distribution did happen this way, and thus it can happen to anyone. Your point seems to be, "well, the opposite can happen too, and you can be swimming in tin, no problem". I agree with that. I suppose your experience shows the high end and mine shows the low end and most people's experience will be somewhere in between. Does that work?