Your post really opens my eyes, deep information with illustrated WOW photos. Really appreciated your time and helpful information.
you mentioned that means you can track more than 2 mins (120 seconds) according to my research we could track 2 mins with roughly polar alignment, since I am living in South Hemisphere, not too sure we can do a proper polar alignment.
The last photo is really inspiring, definitely I shall dive in the deep rabbit hole and my bank account if my path is DSO.
There are different alignment procedures for southern hemisphere, and both trackers support that.