Really appreciate your hard work.   I messaged you regarding the unlocked version I received.  As far as batch 1 z9.   I tried a little research of my own by taking the control board from my 750 hashing batch one mini and placing it on the batch 2 mini and the same issue existed where the hashing would go to zero after some time and could only handle 650 at times.  So not sure what they really changed with batch 2 as I assumed all config were stored on the control board.

Thanks