Bloody hell, look at that chart! $600 --> $10,000 an ounce!
I'm pretty sure the Rh grades will be too low to worry about unless it heads back to $10,000/oz.
The gold is the most valuable precious metal per tonne of BBX ore so extracting anything else that drops the gold recovery too much will be regarded as deleterious.
The boys are working hard to get the maximum $/tonne and will be tweaking the pilot plant continuously over the coming months so they know what circuits they need to build for the production plant.
If precious metal\PGM prices change significantly they can always modify the plant, but right now the gold's where the big money is, although the other precious metals will contribute to big profits with the Pt-Pd-Ag going ~1-3oz AuEq/t.