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Thank you Blueskys. As an old experienced tradesman I appreciate an honist reply as you made. AS I wrote, I have no faith that the reducer will work as stated when the extension tube arrives.
My scope is a trust mounted dobsonian, self made and it would not be possible to move the primary mirror. I could make adjustable trusses but first I'd have to experiment to find just how much movement is required.
I would like to add here that the scope's speci was provided before purchasing.
Again I thank you for your reply.
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