it is not that difficult to calculate on the back of a cigarette packet. That 20% fines contains 72-80% of the current production, so the grade of the -1mm would have to be 2.4% Li20 (if the DMS feed grade is 0.83% Li20 as stated by the company)
If that is so, it is an astonishing anomoly. Of course, the option is to wait for August 2019 to see. I presume somebody is frantically starting work on the fines plant. I know I would.