Don't think you've got a lot to complain about Chris??? They look pretty good to me.
Maybe you need to slightly unbalance the rig so it's always pushing on one side of the gears. Maybe the gear mesh needs a bit of attention - Mark and I fiddled with it a coupe of years ago, but if you haven't used it much in that time, it might have some sticky points. I don't think there is a problem with your computer.
Pity tonight is a bit cloudy, I've been battling collimation all weekend and I think I might have it looking ok just now...
DT
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