“The below” you refer to appears in the Appendix 1 of the DFS,...

“The below” you refer to appears in the Appendix 1 of the DFS, page 41. The Appendix 1 clearly indicate at the beginning that it gives the assesment and reporting criteria for the mineral Resources estimate in accordance with the Australasian Code for the Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code, 2012). That is, it refers to geological sampling during drilling and subsequent grinding for geochemical analysis that were performed at ALS (2017) and Nagrom laboratories (2018 onwards) at Perth.
Metallurgical tests were performed at ALS Perth in 2019-2021 (pages 25-27 of the DFS) and indícate (page 26) that “Grind optimisation of the flotation feed indicate that a primary grind of 180 microns gave the optimum recovery and was selected for subsequent testwork”.

Now maybe you understand why I got many more likes than you: I’m able to read and understand mining projects, from exploration geology to mineral processing. You aren’t.