With the potion stands now requiring blaze powder, auto brewing machines have to be updated.

The fix for Etho's machine is pretty straight forward.

From the back of the machine, there is a solid block on the left of the brewing stand. Replace that block with a hopper pointed into the side of the brewing stand. http://ift.tt/1nE9SyX

Fill with blaze powder. http://ift.tt/1TUaC1n

The blaze powder will fill into the brewing stand. You can also refill the hopper from the front of the machine. http://ift.tt/1nE9U9X