Yes it seems like they could have managed a potential break down...

Yes it seems like they could have managed a potential break down better .
Given they had over 500k tonnes of stockpiled ore , why was not some of that ore been comminuted and restacked ready for flotation so a potential crusher or milling breakdown would not impact throughput ?
Sure there would have been some double handling but would have been cheap insurance for a breakdown .
Early on the crusher was the bottleneck , and they ended up getting a mobile crusher to take the slack.
Company seems to be fairly priced when one takes into account the current management's ability to manage risk both endogenously as just occurred and exogenously via the forward earnings risk due to exchange rate and copper price , plus the potential variance in head grade going forward given past issues with dilution .
Hopefully mill recoveries stay around the 91% rate .
I calculate they should have around $85M in forward cash-flow before mine closure based on processing 8.6Mt 90% recovery , 0.55% Cu grade , $A8440 Cu price .
Much of that cashflow will be going to paying back contractors for deferred payments and accrued leave for employees .