If you google it is pretty easy to find.
$30 usd silver was used for 2year payback.
There is also an article somewhere with them saying lead fell too low and they are waiting.
The NSW mine is polymetalic so although I sounded a bit pessimistic, I am not, the other metals certainly improve the odds. I think they use 7 years for NSW but people assume 10 always anyway, so probably why they need to drill.