I purchased a Mesu mrk2 last year but barely used it. When it has been operating it has been experiencing random RA drifts.
when that happens then it’s pretty much KO for the night unless you restart it all up.
at times the mount acts perfectly and guides under 0.70 RMS
The drift usually occurs around the eAST part of the sky WEST ( eg M82 around 2200 hours, to give you a idea where I am pointing if In the Northenhemp) the sitech software reports it is “Tracking” no error shown in voyager software
I am using a 14 inch ODK with the usual setup of camera