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Good work Starkler.
I built my 10" up from optics, and used a card tube, (sonotube/formatube call it what you like).
I cut a series (from memory about 8) thin ring baffles, and affixed them within the tube, evenly spaced. This reduces, or hopefully eliminates any reflections from the interior.
I also cut and installed a series of baffles opposite the focuser, in an arc. This means that the portion surrounding your 45 degree diagonal is nice and dark too.
Result? It works well.
Worth the effort? Possibly. but I am happier so it must be good.
Gary
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