Don't forget the famous Teck 2019 study ;) requiring the higher up Teck executives signatures! The names not really known but likely included Don and his SVP of Copper and his lawyers :) 

I think it was months of back and forth, maybe up to 1 year of it being completed!

Do we know what that was all about lol? Failed negotiations? Disagreement on value and numbers? I'd like to know about that fiasco!