Many thanks for the response lionel.Other factors I haven't...

Many thanks for the response lionel.
Other factors I haven't included in my calc's are U308, Co and Au. That, combined with the Cu would up the average considerably. All that aside, I'll just bypass the stress I think and stick to whatever MA comes up with, as he has said, he wont sell us short.
I do appreciate reading these posts on this forum. You guy's (and Gal's) really do put in a good effort in yopur post's. It is quite refreshing to a relative newbie to this game.
I'll just lay back in the background now and lurk away. I'll come back on when I have something constructive to contribute.
Thanks and good night,

MTW.