If you plate solve you don't even need to align. The plate solver and Sharp Cap should center your target regardless of the alignment procedure (polar alignment is required, however.) The 2-star + other stars alignment is used to calibrate the goto in the mount when using the hand controller, so if you don't use the hand controller to center your targets, no need to align. That's the advantage of plate-solving.
Gabe is right on this money with this advice.
I used to have a CGEM and would do a one star alignment, get the mount pointed and centered on something like Mizar.
Not needed, you just need to make sure the mount is initialized set to the home position then go from there.
The first platesolve on the initial slew is likely going to fail, but provided you have fail over to blind plate solver setup, that should recover.
From there, platesolves with ASTAP or platesolve2 should work from there. I haven't had my CGEM mount for ~4 years, so it is possibly I am forgetting a step.
EDIT: Not having used sharpcap, I'm not familar with it's platesolving mechanism. So, I'm assuming it has a blind plate solver option (or failover).
Good luck - John
Edited by John O'Grady, 03 December 2021 - 05:40 PM.