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I think that Mike will agree with me that you should get Moonlite CR2 focusor. When I was visiting Mike he showed me the Moonlite installed on his scope. I must say just by handling it in daylight, it felt extremely smooth. It has a course focus which is fast and a fine focus which is very smooth. Mike could tell you so much more. I must say that I have a crayford focusor on my Orion 80mm ED and it was not as smooth as the Moonlite.
Anyway I suggest that you ask Mike for more detail.
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