I plan to do most of my shooting with my EX3 mounted on my tripod. I am planning on adding heavy duty batteries, DOF adapter, Matte box and maybe a Nano down the road. I'm wondering if it would make sense for me to go with the full shoulder version of either the the DM or the VFGagets in order to mount batteries and or address potential balance issues.
I have 2 EX-3's both with the VFGadgets version with 15mm rod adapter at bottom. Great for tripod stuff, and rod mount at bottom makes the lens height the same as a full size camera. So no need for riser when using Prompters.
And you will need the rods for any kind of adapter and matte box, follow focus etc. That is a must in my book. DM has not rod mount.
Haven't bothered with the shoulder mount part, because unless your going to put a full size "brick" on the back that weighs close to 4-5 pounds. Only then will you have true balance. And I don't think you want that other contraption hanging 12" behind your back, you turn and split someones head open. If you go with the dionics batteries they only weigh like 2 pounds. And your still going to be front heavy. And you can get the fater Sony or Swit batteries and 2 or more would cover your day just fine. IMO bigger batt are overkill and more costly.
For hand held I use the Cavision shoulder mount system with hand grips.
It's always going to be a awkward camera to hand hold.