cprktrader, I watch the company PRs and this forum quite closely but I haven't seen one item from the company indicating in any way that low grade ore is somehow useful in tuning up the mill or even that tuning up the mill is an extended process. These views seems to have been home-grown only in this forum. Mining handbooks don't talk about "tuning up" a mill or intentionally using low grade ore for some indirect reason. It's either physics that works right away if the design is correct or it's a learning curve for the mill engineers. I suspect the latter.
I will admit to the need for the various con-holding tanks to take some time to adequately fill (such as in the thickeners) but not to the extent that 200,000 tons of ore is required to do so. I am recalling Colorado1's estimate of HT ore extraction for this comment.
This penchant for perfection, if true, is quite inappropriate, imo, when the company needs cash, LTF, and settlement of some various obligations - or shouldn't we even worry about those concerns because we can conclude, perhaps erroneously, that since low grade ore has been used MD and others must not be worried to any significant extent or else the high grade ore would have been more actively processed in order to increase early cash flow?