Ann: Pre-Pilot Plant Milestone and Technical Strategy Update, page-48

Inclusion of this wording

"Develop the commercial scale mass and energy balance" ​

is the reassurance I have been looking for, it confirms the belief that real operating data has been used in the process modelling released.
So much of the performance data can now be viewed there, with reasonable confidence that it is in fact accurate. Process modeling is a very reliable discipline if the input data is also accurate and complete
https://www.asx.com.au/asxpdf/20180228/pdf/43s02ddygpyy15.pdf