Do you agree with what I have written? Any additional points I have missed?
When you describe reflectors you state that one mirror is flat. This true, by and large, only for Newtonians and other folded optical path designs. My scope is a sort of Cassegrain but, to be fair, it does contain a flat just before the camera or eyepiece assembly.
I find it amusing that you have a Celestron NexStar 5 SLT which is a Schmidt-Cassegrain I believe. It also has a flat for ease of uses near the zenith.