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I changed the alt teflon bearing with regular bearings. The ony problem is the braking is a lot harder. So it is a catch 22 situation tighter braking or smoother (very smooth) motion.
It is not going to worry me too much though as I expect I will put a couple of motors an that will do some extra braking for me.
I am working on a motorised focuser for the original crayford, I have really needed it for the planetary imaging.
Working with the original parts is ultimately what I am trying to acheive. Otherwise I would buy a specialise scope and mount.
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