One thing that I always wondered about with regards to EAC - the startup sequence and the tutorial on the subject says that you move your IFFCC switch to test to run the startup BIT while the EGI is still aligning - but when you run the startup BIT for the IFFCC, it says "LASTE: Set EAC switch in ARM", implying that EAC should be enabled at that point.
Why is this the case? If the EGI needs to be fully aligned to switch on EAC, why do the aircraft's own systems suggest differently? Just seems kind of odd to me.