RE: Playfair market cap/contained metal....You're well intended lurker but you know nothing about mining. Endako was already built and all infrastructure was in place - logtung will probably need 100 million plus JUST FOR A ROAD!
Apples and oranges. Grey Rivier will likely need about $20 million, Logtung $4-500 million. Like you keep saying. Something to think about.
You should ask them about metallurgy too lurker. moly/tungsten circuts are tricky. If they tell you they aren't that will simply prove they don't actually know much about it.