I agree with most of what you say but I think you're confusing ounces with grams. I'll be grams per tonne not ounces per tonne, though I wish it would be. There are approx 31 grams per troy oz. If it's 4 or 5 GRAMS per tonne it would be very nice. Forget ounces, that's just a dream. I'd love to be wrong.