Here's a basic setup of rails, HD Handles, base plate, and Adapter plate from Express35.com. I emailed Chris about how I like using the cheap $24.00 dollar shoulder support, but you have to be somewhat inventive to create an adapter for offsetting it. I was surprised to hear back that as an experiment Chris setup this horizontal bar to adapt the rig and to offset it. It's extremely solid, and also an inexpensive way to adapt the two instead of using more expensive rods and clamps. This is not a final design in any way, but nice to see that he's willing to adapt to other accessories we choose to use. A few others have expressed interest in how to do this, so if you've got questions, hit up http://Express35.com or follow Chris via Twitter @express35.
Ooops! Looks like prices are slightly going up. Might need to change the name.
Shoulder Support Pad for Video Camcorder Camera DV / DC