99% of Mexus investors (maybe even 100%) would have no clue what they were looking at if they actually did a visit to the Santa Elena mining operations. What a site visit would do is allow professional salesmen like Lemas and PT to work their charm on their visitors.
And I think you are right, any attempt to bring along a professional geologist or mining engineer would be discouraged. Taking splits of pulps or core, taking their own samples, maybe doing a little geologic mapping, looking at drill hole logs, and so on.......nope.
I seem to recall someone saying they were allowed to take a high grade sample from the underground workings, or maybe it was a sample from the dumps. Nice "souvenir", but kinda meaningless.
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