I based mine on advertised upper end quotes on the web….obviously there was a bit of fudge factor in those asking prices…some from India etc…That said, by the time these guys are producing the - long held rumour is - that prices will be buoyant again. If not so be it….Anyway, I've revised my expectations somewhat downward….7-10¢ would be doing really well….and it's only two-three years away once they get their get their act together….