They can do it via conventional flotation with recoveries from 64%-88% however leaching provides greater levels of recovery (as you'd expect) and optimization is ongoing. They will need to weight up capex vs economics of a higher rate of recovery. Resource size isn't going to be an issue.
Its possible stage 1 just assumes basic flowsheet to minimise capex and lead time to get some $$ through the door while prices are sky high to fund a more capex intensive stage 2 (similar to NZC or even RNU - Although RNU is graphite obviously).
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