FSA Comet (CKM-7158T) crank removal problem. How to?
Use the self extractor. Most two-piece road and mountain cranks that have self extractors don't at this point feature any other real way to do it, even if a conventional type puller could in theory be made for them. FSA in particular has about a million different threads they use for the extraction threads. If tools for them all exist, they're not commonplace.