I started making this system for the Sony EX1, but by request of Convergent Design and dealers I have now adapted the system to Canon Cameras as well.

The plate kit including all necessary screws and wrenches to mount on Canon Cameras.
This makes your canon tripod mount really solid and the plate also allows the use of the shoulder brace system, shown in photos, that can accommodate larger batteries.
The Wing and NanoFlash Arms are also compatible.

Here is the site for ordering:
Canon Tripod plate kit (http://www.westsideavstore.com/index.php?p=product&id=8&parent=1)

You can also contact me for any questions and comments:
olof@westsideav.com
603.383.9283.