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Nice job Ray!
The inside of my 10" f/4.72 dob is lined with a felt like material. I use my scope mainly for visual use. I also have a three speed computer fan and a cover over my mirror for cooling before I observe. I experimented with foil about 5 years ago.....had it on my finder dew shield and my large dew shield was covered in a reflective substance.
Do you think reflective tape or foil covering the entire tube would help for visual observing to further stabilize thermal gremlins inside of the tube?
BTW, your pic of Saturn is incredible!
Cheers,
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