Been working on SWAT this weekend and here is the first item I have completed.

Uses 2 M5 x 10 mm pan head bolts to hold it on to the saddle. Even though I don't ride Specialized saddles anymore, I really think they got this one right. Much more secure than anything that snaps into the saddle. Also not nearly as dependent on manufacturing tolerances. This is what Fizik ICS and Toprak Quick-Clip should have been.
I also have finalized a redesign of the Fizik ICS clip and the first model finished is this GoPro mount using the new clip design.