The new resource update Sep quarter (so lets say Sep)
to give at minimum 2 year reserve at eoy is 2 year + 3 months ( oct nov dec)?
so they are finding enough to not only maintain the current mining level but to also grow another 3 months during a 5 month drilling period (ie. 5 + 3 = 8 months resource while mining 5 months worth)
Which means even though it's still only shallow drilling (deeper later on) they are finding it faster than they are depleting it, which is good news.
Though mentioned recent drills grades including
8 metres @ 12gm
1 metre @ 24gm
6 metres @ 48gm
suggests he is being conservative.