I'm trying to replace the stock FSA Gossamer BB30 crankset on my Cannondale CAAD10 with a FSA Hollow Carbon Crank BB30 (It's essentially an SL-K)
What does this mean ? Where did you source the crank from ? Which exact model is it ? it either is or it isnt an SL-K crank.
Does the FSA Hollow Carbon Crank have the exact same spindle length as the Gossamer crank ?
Have you checked the bearing covers are not the wrong way round. Back to front ?
Have you tried removing all the spacers and the wavy washer ? Have you experimented at all with removing 1 or both the bearings covers and using a plastic washer in their place instead ?
Are the BB30 bearings fully seated and are they against the circlips inside the shell ?
Is the carbon BB30 crank spindle definitely not twisted/bent ? Is it new or used ?