"and why they haven't done some SEM or minerological work to...

"and why they haven't done some SEM or minerological work to understand the nature of their mineralisation and why the assay numbers are non-repeatable?"

That was done way back in 2015 read the dec 2015 half yearly page 3 , SEM was done at the New Steel -CTSS laboratory outside of Rio


"If they are using a tonne of copper catalyst to produce an ounce of gold then its hardly a viable business plan is it"

THe Copper is acting as a collector of the gold , it is recycled back via electrowinning a bog standard low cost industrial procedure , so it is not going to waste .
Also its a lot less than a tonne of Cu per oz Au .
Its good that you post as you probably represent Joe average investor , and your posts verify that the average investor can not conceptualise what BBX are doing , which vindicates to me the critics lack a scientific base for their arguments .
Anyway keep posting as I find your posts bewilderingly entertaining .