What size is the wire on your cage? It may have to do with the actual size (the distance between the wires) of the wire. Can you post a picture of the cage and where the flying saucer is attached?
The only trouble I have experienced is having a wire break once ... of course it was after about 4 years of use and having two of my heaviest chins run on it at the same time, so I can't complain.
Jo Ann