Report "My BSA Deer Hunter 20-60X60 Spotting Scope has had parts come loose inside. I cannot determine anymore about the problem because I cannot determine how to disassemble it. I bought it new and fastened it on the flip-up side door of my bullseye shooting box to use during outdoor shooting matches, but have not had an occasion to use it since then because all of my shooting has been indoors with target return systems. Recently though, I wanted to shoot outdoors, and discovered that the scope could not be used because of the problem inside. The part that is loose inside has left some kind of marks on the inside of the front lens, probably as a result of opening and closing the flip-up door it was fastened to. I never heard anything happening inside the scope with the protective covers on front and back. Anything you can tell me would be very much appreciated"