Pretty sure I read this phase takes so long because the initial alignment is done using the same extremely precise, slow-moving actuators as are used for focusi

Pretty sure I read this phase takes so long because the initial alignment is done using the same extremely precise, slow-moving actuators as are used for focusing observations, on a per-mirror basis. It's not because it's a manual process, it's because they opted for simplicity in the actuators department rather than having another coarse+fast mode in the physical mechanism, or redundant mechanisms.