///Someone has to answer the queries and probably AD knows...

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Someone has to answer the queries and probably AD knows better than anyone else the score. If he is good at typing a brief reply would take 5 mins max. I don't see that as a big deal if AD is working 10+ hour days as I hope he is!!!! It's probably a welcome distraction from the day to day grind.
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Yes I wonder if he is a touch typist. LOL

Typically the MD should not be replying to individual shareholders (imagine Sol replying to a mountain of letters from Telstra mum&dads). It's not good practice, however in a small coy like this there's probably not a lot for AD to do. Prepare some presentations, make sure that the guys drilling are still on track, have a few coffees... early stage, non-operation resource companies require a lot of 'waiting around' before even the detailed planning takes plan.

But it doesn't impress me that the MD is replying with speculations on when announcements will be released. He should find something better to do.