SiTech Mesu and image centering

I used to have problems with my Mesu 200.
I originally had the Scope Encoders set to polite mode, but because my ticks per rev was inaccurate the mount would oscillate. This meant that when it issued a snyc the mount had move away from the image location.
I was sometimes struggling get within 1000 pixles after 15 attempts.
I finally set the Scope Encoders to ignore.
I now centre to less that 10 pixels (often sub pixel) with less than 3 attempts.