Ann: Kachi M&I resource update 2.2mT LCE 3.1mT Inferred resource, page-268

When you say “A lot” tighter, I presume this is say, circa +/-10-15% (half the range Lake currently have, “a lot”) this would be more appropriate for a DFS. But you should know that. Common knowledge and all.

Actually, I’ve got a moment, I’ll help you with your first reference.

”Preliminary Studies are accurate to ± 25-30% and are typically obtained by factoring known unit costs and estimated gross dimensions or quantities once conceptual or preliminary engineering has been completed.”

oh look, it suggests the range that Lake have stated (which would have been advised by Hatch) is on/around the same mark.

This is from a document published by Stantec Consulting, granted for hard rock - but relevant here also.

https://www.stantec.com/content/dam/stantec/files/PDFAssets/2014/Hard%20Rock%20Miner's%20Handbook%20Edition%205_3.pdf

I could always additionally refer to the documents my colleagues and I prepare for our clients - but quoting yourself seems a bit self absorbent.

However, 3 more minutes on Google yields other consultants and other reports showing similar ranges.

I suggest you might want to refresh your “common” knowledge.