Update, these ATP - Anti Twist Plates are now available over at the PhotographyandCinema.com website. Newsletter subscribers should have have received a 20% discount coupon code today. If you're not sure what this is, here's an Original Article Post (found here) and a video explaining the product below.
Or check out more information by visiting the ATP - Anti Twist Plate Product Page (here).
(Above) Example shown with 5D Mark II, Panasonic GH2, Nikon D600