Floatation from above the rig works better for me than having bulky floats on short strobe arms which interfered with positioning. Now, even when the strobes are positioned low, the floatation is above the camera, so it is easier to hold the rig in a fairly upright position.
My camera is now neutrally buoyant and well balanced from side to side. It's nice to let go of the camera and watch it remain at your side, like a loyal dog. I think a neutral camera could also provide a useful visual reference, to help a diver maintain a constant depth, when in the blue.
The Flickr link below shows how they are attached. If you click on any of the 4 photos you can read the notes.