Debt free and SP stagnant?, page-42

ahhh, my question answered in a round-a-bout way; so one could feed in the higher grade for 5 years and have 5 years of lower grade stock piled; so if POG increases a lot, then you 'tweak' the mill for the lower grade and do that for 5 years; is that possible, logical, doable, sensible

I have seen a few very successful miners only ever have 3 to 5 years reserves, but they mine for 20 years just replacing oz milled with oz in the ground as needed; if only it were so easy; but a lot of what I read from you guys does make me think some more oz can be found