A star tracker is a very worth while investment. Sometimes they are frustrating but I have learned many little tricks and tid bits that make using it easier. I share them all with you in the video. For the more advanced users out there I put the more advances stuff at the end of the video. Hope you find this helpful.
I also want to direct you to this excellent article by Andrea Minoia, it is loaded with tips and trick to use this star Tracker. He uses the EM10 for some of his work.
https://nightskypix.com/skywatcher-st...
Here is a link the the 3D printable Rotary Switch Cover.
https://www.thingiverse.com/thing:493...
And this is a link to the Polar scope illuminator adapter.
https://www.thingiverse.com/thing:280...