You don't believe that Bitmain ships early traunches of technology to select "very large" customers? They do for a fact. I also said if they don't already have it they will soon. Moreover, the switch from a 26 nm L3+ to an "L4" will most likely come before the "S11". Much cheaper and easier upgrade for the manufacturer. Having said that, I have an inside source that sells massive quantities of Commercial miners and he is buried in inventory from large mines clearing their shelves to make room for their "pre-orders ". So if not already....very soon. Bottom line is. Don't be in a hurry to buy Legacy Bitmain miners. They're about to get much cheaper.