Gday Lee
Thank you for all that, it is indeed very helpful.
I haven't worked out what torque I will need (not sure if I will ever work it out!) but I am hoping to wing it as you said. I suppose I will get something more powerful than what I think I might need and hope this works. A QHY9 and 7 pos filter wheel will be hanging off the back of the scope so I would imagine it will need a fair amount to get that all round.
So would the Big easy and the 1.68amp stepper be an ok combination? I know you said it doesnt have the step size of the smaller one but I don't think I will need to be hyper accurate with this rotator (as opposed to a focuser)
Hope I am making sense
Jeremy