The FLI shutters are not made by FLI but are a 3rd party item. As I recall the brand name of the shutter is somewhere on their site - perhaps in the description of the Proline cameras.
I also recall they were supposed to be rated to do 1 million activations.
Sounds like dusty blades and need of a clean and lubrication.
It shouldn't be that hard. If you pulled it apart it may be obvious what the cause is.
Greg.
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