Thanks ChrisV.
I think I'm missing something fundamental, I have never done AP so I don't really understand arc-sec that well. OK so there are 3600 arc-secs in a degree.
I found the OnStep Configuration Calculator excel spreadsheet but I don't really understand it. Adding a gearbox ratio seems to improve the tracking resolution but increasing microsteps doesn't, if every step is 0.9degree and I microstep a 256th of that surely that should improve my tracking resolution?
3.75:1 is speeding things up right, how can tracking resolution improve when your 0.9degree turns in to 3.375degrees a step?
I don't think I even understand gearing very well, if the worm gear ratio for R.A. is 130:1 and Dec. is 65:1, R.A. is the important one, what does that actually mean 130:1, 130 rotations of the axis knob moved the axis what amount?
