Trial open cut mining planned: ~100Koz pa Au at a conservative 1oz/t Au, page-79

Because they've already sampled the fresh gabbro rock that they are about to drill and it's going ~180g/t Au equivalent (with PGM, Ag credits)

There's no weathered horizon because it's fresh rock outcropping so they have sampled the same body of rock that they are about to drill, so it's extremely likely that they will get the same grades when they drill into it.

Drilling is just another type of sampling. Jeez, you've got more than 12,000 posts?