Way back in the early 90's, had my near new Astro-Physics 130EDT on the sofa while I unscrewed the 2.7" extension piece from the visual back. Naturally as the threads separated, so did the extension from my hand taking a large chunk of paint out out of the tube. Annoyed at the time but I got over it and used and used that scope for 22 years. Sure when I sold, the mark (and others) took the value down, but I had had a lot of good observing with that scope. So the moral is - don't worry about it, just make sure you get a lot of use out of the camera so you get the value out of it.
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