I just got an e-mail from the Arca-Swiss factory about a new tripod head, the C1 cube. It is a rational (double tilt) head with self locking micrometer drives, a panoramic base atop the tilts. It "offers yaw free horizontal panning ...allowing 360 degree turns which leaves the camera set-up perpendicular or yaw free. As the camera is being tilted in the center of the circle the object-distance barely changes and the photographer's eyes do not have to follow the camera." To me it sounds like this might be perfect for stiched together panoramics or those situations where you've set everything up but realize you want the camera pointed in a slightly (or greatly) different direction but dont want to relevel. The head is equipped with an Arca-Swiss QR shoe. No specs wereprovided as to price, size or weight.