The stepper is hooked directly to the stock focuser knob. I do not seem to have backlash but honestly I have not been able to use it much since installing it. I will have to find the teamviewer program and load that. I have never used it. Will get you my personal info out today. I normally am at work 8am-5pm here on the east coast.
This would need to be don under night sky or before dark? Clear skies have been very few lately.
Thank you very much,
Randy Flynn