Sorbothane is the bee's knees for copter vibrations. I tested a crazy amount of material in rusty's original floating plate before settling on sorbothane. While I have just gotten started taking videos, I have hundreds of tack sharp photos since "padding up" as I pictured in Rusty's thread. I used to have problems with side to side play with the old floating plate but with the new round style it is fantastic.
Here is my workhorse quad rigged up like the Y6 in Rusty's thread. I am always amazed when I touch the camera with the quad hovering and find I can't feel any vibration at the camera.
, on Flickr