you are the one making a misleading "break even" figure of 4g/t up not me so no explaining nor guress from me needed...
as for you... please explain where you plucked this figure from
"Well if the true width is say an average of 0.5m (0.8m is indicated) then stoping with require 4x material dropping the feed grade to 17gpt which is still 4x what is required to be breakeven.