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Thanks Matt
I worked out for sure that the thick tape is definitely not good as the weight of the secondary moves as I bring the scope up and down. I’m using both a laser and Cheshire. I will try to cool the primary as best I can. As for coma should I get a coma corrector? I was told a F/5 shouldn’t need one. When I look a say Jupiter for example, with the 10-6mm eyepieces it seems as there is a double image and they are slightly off resulting as a big blur. Is this coma too? It’s hard to explain exactly what I’m seeing. I also don’t know how well figured my mirror is. It is 20 years old, the original owner still had it in its original box as he never got around to building his scope. It was made by Nova optics. Do you think it would be wise to test the mirror? And if so can I do this myself at home? I would even know how to test the mirror. I might join the asto association club if they are allowing new members. Anyway I appreciate all the help you have given me so far, mich appreciated
Thank you
Daniel
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