For those who have never used the custom plates, I just felt the need to post a pic.
This is a Mestos bottom plate. It is a part of the grip and never comes off. (With the grips I like the base plates, and the Ls more with just the bodies. Though if I could find a BDG-5 L plate I would buy another grip for it.)
It is smooth, sleek and well designed. It had never made a single mark or scratch on the grip. The picture makes it look a little big but it is hardly noticeable on the camera, and the entire thing adds no more than a small dovetails height to the overall height of the camera. It is always ready to drop into a arca holder in a second and even has a screw mount for other accessories, and unlike the grips, it is dead center with the film plane. And look how it fits, precise and unobtrusive. I almost think of it as a simple correction for the poorly placed tripod socket with a bonus of having a quick release.
The RRS ones are veritable works of art.
If I put that on my Photoclam or Markins or FML ball heads and drop it down the notch so it is sitting vertically with a long lens, say the 200m f/2. In 24 hours I can come back and take another shot. The lens will not have drooped even a pixel. You simply cannot get that anywhere else. That is true "no-twist".
Granted these things are not cheap. Good tripods are not cheap. But they are worthwhile investments. And if this PixelShift lives up to half the hype, a lot more guys are going to want good tripod systems. And it all starts wiht getting your camera on and off the thing.