Diana model 45

I have a late 1980s model 45. with several thousand rounds through it and no troubles other than it eats scopes for breakfast five or six of them so far. Had my Bushnell Trophy on it for a time but took it off for fear of destroying it. Recently put some cheap lightweight Winchester branded scope on it and it seems to be holding up better than most. It's a shooter though very accurate one inch groups at and past 50 yards. I was told when I purchased mine that it was one of the early units with the synthetic seals and the guns before had leather.