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Yusuf987
Been a while since I looked at these but I suspect you are out of luck because your FSA crankset has an axle that's too short leading to the biding when you tighten it down.
The newer Cannondale frames use wider bottom bracket shells - 73 vs 68mm - meaning your FSA axle is 5mm too short.
There are other cranks that fit fine - any of the 24mm axle cranks can be adapted to fit as can BB386 and older SRAM 'BB30' 30mm axle cranks.