Here are the rest of the photos.
For shooting video on a tripod or a monopod, the RRS rail with the perpendicular clamp snaps into the Kessler Qwik release receiver. There are safety stops on both sides to prevent the rail from sliding out of the receiver. The camera snaps into the perpendicular clamp, and can be adjusted fore and aft along the rail. RRS has other rails with a more simple clamp built-in, which would save money. I like this combination, to get the small Sony A7s body up higher for clearance of lens hoods. The lens attached is the new Sony FE 16-35 f/4.0 OSS ZA.

I've been trying to figure out a universal stills/video solution for my 5d3 and NX1 - and I keep coming back to arca compatible base plates, can I ask why you didn't just mount the RRS QR directly to the tripod plate? Is it just to get the additional height? I know you have the adjustability of the second plate as well, but I'm wondering if you can get the same results with a long tripod plate.

He stated that it was "to get the small Sony A7s body up higher for clearance of lens hoods."

This is a great method to also be able to use camcorders and still-photography-style-cameras together.

I like the Kessler Qwik Release system. I just wish they applied that to Manfrotto 501 plates as I have a stack of them here and easier to swap between heads.

RRS plates can be used in the Kessler Qwik Release receiver, but cannot be used in the Sachtler video head QR "receiver" directly.

If one owned the (apparently fabulous) RRS video fluid head, the RRS plate could go directly into the RRS video head QR receiver, but there might still be clearance issues with some lens / lens hood combinations on the small Sony A7s body.

I also created a custom monopod combination for stills and video. RRS / Benro / Kessler.
topic for a different post.