Its possible that once the mountain is drilled out the resource...

Its possible that once the mountain is drilled out the resource could get to 5 million oz, easily.
Porgera is 28 million.
We have 2 million in JORC.
Indicators are that there's likely to be another 3 million
Probably have a further remarkable cheap million in the Black Zone to date.
Equally possible, the BZ at depth has another million in dilation zones and the extensions but to be drilled later.
In oxides between the WRZ and the BZ, probably another million.
So your projected hypothis is definitely doable given receing proven wrongent results.
A lot of people are being proven wrong in the "process".