[MENTION=368868]Gus90[/MENTION] I know about the Fizik slot, ProLogo uses something similar based on a Topeak design. I don't own a single Fizik so even though I know how it works I have never seen it in hand. I didn't do anything about the ProLogo since the clip is part of a small plastic cover and not part of the saddle shell. I have my doubts about how sturdy it is.