1. I used a standard Manfrotto-style quick release plate which I moved back so that the sensors were not covered. This meant I had to drill a two of the existing holes to make them bigger but it works.
2. I now think there may have been a way to mount the same Manfrotto style plate sideways across the baseplate, which is something I plan to experiment with.
3. I have also ordered a set of three iFootage Seastar Q1s quick releases for my other cameras but I plan to try them on the 4D. iFootage Seastar
4. Manfrotto are marketing something similar called Manfrotto Move, which I did consider before opting for the iFootage product. Manfrotto Move quick release
The Manfrotto Move is rated for 20kg while the iFootage Seastar Q1s (improved since the original Q1) is only 9kg but I chose the iFootage because of the anti-twist grub screws and slightly better ease of use.
1. I used a standard Manfrotto-style quick release plate which I moved back so that the sensors were not covered. This meant I had to drill a two of the existing holes to make them bigger but it works.