You also might want to use the old IC2 machines, as they don't have so many complex, unwanted additions. It is much simpler, and saves more processing/RAM. If you accidentally click the wrong button in the automacerator GUI, it screws up the outputs/inputs/energy-configuration, and it is difficult to find the source of the issue before the entire contents of your ME network is crammed into the buffer-slot, or worse, your precious diamonds/rubies/emeralds being ground to a fine powder.
But you only do that if you are stupid.
Really, the two buttons only disable/enable autooutput of items and energy.