Originally Posted by rpenmanparker

It is NOT the way most self-extracting cranks work. The ones from FSA are not easily disassembled with a separate cap. All of mine have only one Allen head, 8 mm. No cap, no 10 mm opening. The 8 mm bolt is constrained, but not by a removable cap, or at least not one removable by an Allen wrench. At one time some had a "cap" that screwed in with a pin spanner.

Yes, senior member indeed. Smile when you say that!