why cdu has to be a lt investment, page-16

fair enough, it's up to the individual to decide what they expect. that's what the game is all about.
I would feel more comfortable if they went for much bigger throughput at a lower cutoff.
they may well get more metal early regardless, but it is the bulk of the resource which matters over the timeframe expected. That is the reason I used 3 and 5 years as an example of where the SP stands in relation to a shorter timeframe with higher grades.
There is nothing (imo) to suggest there is a major problem with sampling or estimation of the bulk of the orebodies.
unless they have a problem with their own interpretation.