I have never had any dramas with the accuracy of my HEQ5 goto. As long as you polar align it properly it will hit targets all night. If I am slack then the goto gets progressively worse over time but I cheat and resynch every now and again
. My LX200 is always spot on whether it be planets or other objects in the sky. I do recalibrate the motors and sensors every 2 - 3 months and have carfuly set backlash etc. My biggest gains were made when I put a peterson tuning kit through it.
Mark