Quote:
Originally Posted by richardda1st
Item 2, flatness of the mirror is not critical, it is the center of the reflected spot that is being lined up so slight deviations in the appearance of the image have no affect.
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I don't understand that bit.
In my experience a tilted mirror is a problem. I have experienced this on an A/C with an SCT. Very hard to iterate towards a finer alignment if your A/C mirror is not square. Unless I'm missing something?