...and run a roll of film through it, and make sure to use every shutter speed. It's really optimal to shoot a scene with a little white board or note cards noting the shutter speeds so you can verify when you get prints or negs. I went through 3 Canon FTQL bodies before finding one that worked decently - their shutters just don't last like the Nikons, but I still love that big brick-like shape. One of my favorite bodies.