simmo,
people are entitled to their opinion but when that opinion is expressed several times without waivering to the facts then maybe a curse word is inevidible.
grades are irrelevent when tpa and cost per lb are known. in pna's case we have expanded production at 65,000tpa at a cost of 70c/lb.
the other factors andrew was referring to are not isolated to pna nor are they relevant to grade.
cheers