I read on another site that some of the 14.0s had riser burnouts from high heat and had to be redone. Not sure if that's true but I heard it independently from 2 different resellers. I've been trying to add one more s9 for like a month now. I actually got in to the bitmain site once but I didn't have the bc on hand and it took me more than an hour to swap around,  and I timed out on payment. 2795 price,  Feb shipments. Very frustrating. A month ago I was passing by them at 3-3.5k for way too expensive. Dumbme.