Here is a short document I made up to make it easier to see what type of clamp you would need for mounting any type of action cam, light or other device on specific bikes. Please note that I currently only support 2 aero seat posts, the Cannondale Synapse Aero and the Felt U-M 1.1 Aero:Road. All of the round sizes are supported. Each mount is specific to the size of the seat post. That makes the interface more secure and it can be made lighter in weight at the same time. I hope this helps.

I am in communication with Felt Bicycles to get diagrams of the profiles of their seat posts. In the absence of this, I will continue to reverse engineer the mounts as I come across the posts myself.