Cheers Dave. I'll check that out today.
I got the stepper installed on my Meade ED80 yesterday however the focuser isn't going to be adequate for the weight of the QSI. If I tighten the focuser tension so the drawtube doesn't slip the stepper can't overcome the friction and if I reduce the tension so the stepper is happy the drawtube slides out. I have a solution though and I've been looking for an excuse
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http://www.focuser.com/cgi-bin/dman....cgi&product=CF