I see David Bassanese(Chief Economist) from BetaShares is predicting the Aussie will fall to 0.62c to the USD by the end of next year.
Let's hope that comes true.
All we then have to worry about is the zinc price in USD.
Operationally I can't see any problems in ramping this up to 12Mtpa by March.
that will generate 400mil lbs Zinc per annum.