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As the link quoted by Merlin says :
[The focus motor is compatible with all SCTs from 6” to 14” in aperture that have been produced since the year 2006. It is not compatible with 5” SCTs or older models.
Yours is definitely an older 1990s model with the cast back and so has a different focus shaft assembly.
It really is good to focus without the shimmy and lock up the focus knob.
Your only option is to buy a second hand JMI / c8 celestron focusser unit on Cloudy Nights as I did ( or make one from another similar device) It is really only a geared DC motor with a friction fit rubber o ring coupler for the focus shaft. Very basic but also quite well thought out and somewhat foolproof.
Without a matching variable speed hand control however, it will not be satisfactory.
Good luck.
Cheers.
QUOTE=vaxvax;1416573]
Thanks for the reply.
As i said in another thread, Celestron are releasing a new model of the Focuser mid this year which is supposed to fit many more SCT types.
I will wait till then and see if the new one fits.
Regards
Peter[/QUOTE]
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