$8 TP by June 2023 !! Research Report, page-119

deep ore body's aren't as bad if they start near surface.
As long as they are making money as they mine which will be the case with C3 the depth should only have marginal effect on the economics.
Definitely hunting for more high grade but really I don't think it's gonna be a big problem if they don't find anything sexy.
Pea should shed a lot of light on this.
Plus if we see an improved copper price by the time this starts breaking dirt (assuming we even make it that far without a takeover) the margins should be strong enough for a fairly quick payback anyway.