I guess its possible they'll try to justify it by claiming a...

I guess its possible they'll try to justify it by claiming a higher rate of production:
PFS: 70GL x 7.3 = 511kt x 83.4% recovery = 426ktpa SOP
Accepting their PFS recovery figure: 100GL x 7.3 = 730 x 83.4% = 608.8ktpa SOP
If that is the case it will increase CAPEX considerably, but they'll claim an OPEX benefit & a "Capital intensity" benefit...
But I think that the reduction in groundwater abstraction & treatment (from 5 to 3.5 GLpa) would not sustain a higher level of production and the salt at 18Mtpa looks low too. (Are they going to harvest it and put it on a discard pile?)
There again we shouldn't have to wait too long - the DFS is due out by the end of the month and then we can judge for ourselves if they have met their claim that their "DFS to set a new industry standard" which was the title of the slide on Page 21 of their most recent presentation...