I ordered this upgrade for Crayford focusers for Skywatcher dobs:
Now, mind you, my dob is 10+ years old, flex-tube. It arrived today. I posted this thread:
Because it took me a while to get the last screw unscrewed in the focuser. I installed the thing.
My focuser tube rattles around and won't actually focus. If I tighten the screw that should tighten the focuser tube, there are two speeds. Either, rattles and focuses, or, no movement at all.
I re-install the original focuser tube and metal plate and......
.....it works fine.
Is there a trick here? Can I get this 2-speed focuser upgrade to work with my ancient, beloved Skywatcher?