I strongly suspect that less than half the deposit's value is currently known. The East flank has the makings of a very high grade zone - some additional assays should already be in Geodex's hands for release in the near future.
The report mentions that pre-feasibilty study will be available next summer rather than next month - possibly this is to include in all zones rather than the currently known grades and tonnages. It's going to be a busy winter for Geodex.