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Hi Tony,
Yep we are hanging out for some nice dark skies. Transparency has been terrible recently in Brissy.
I think that I will have to pm you the files as the stl format does not appear to be accepted.
I will send some photos of how it fits. Use 40% density as this gives good structural strength without the weight. I use load spreading washers or a metal plate to attach to the focus body. 4 X machine allen head bolts are enough. We use a 9 pin serial connector in a home made cable in this particular one but in another I have used a 4 pin microphone connector as it is really secure and has a screw in collar.
All the best
Mike
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