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Many Thanks for your suggestions everyone, and thanks for taking time to snap some shots Chris.
I would love it if everything was threaded, that would make things much better. Unfortunately it's the tube-inside-a-tube fixed with two thumb screws which is unsatisfactory. This is likely due to the cheapness of the original Skywatcher focuser on my scope. It doesn't even have a compression ring, so the camera adapter is ALWAYS crooked in the focuser.
I've susses out the JMI site, and it appears even their T-adapters are two thumbscrew as well. Oh well, if I can't find something off the shelf I'll have to get a workshop to make one for me.
Once again, thanks everyone.
Cheers,
Jason.
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