I must have been one of the last purchasers from Batch 3, I feel a little hard done by when they announce a 4th batch $600 lessor in price when they hadn't even dispatched my order yet... Anyway moving along, I don't if this has been raised but I'm curious about the Quality Assurance standards are with Bitmain. I just received my S2 and its been running for 8hrs now and I've been monitoring it for the last couple of hours and the hash rate has been falling about 10gh an hour for the last 3 hours and its now sitting @ 935GH/S (avg). What this the tolerance of hitting the target? Because >-5% doesn't seem acceptable.