Re: Edge arm holder wobble
If the arm holder itself is loose, and you can see the holder itself wobble, tighten it (*important) not too much or THE ARM HOLDER WILL SNAP, this has happened to me). And use some jb-weld (blue or *maybe* red, you don't want it to be permanent).
If the arm holder itself doesn't seem to be moving, it could very will be (and most likely is) the Bushings on your trem arm. These are those two plastic things at the bottom of the arm, and they hold the arm still and make it easy (or even possible) to flutter etc. I suggest you get some new ones, you can order them from Rich, I believe he has some in stock. However, even after I got my bushing from rich, I'm still using the original ones that came with my RG because of this one trick, and Steve Vai's tech uses it: Put a lighter flame under the bushing, don't do it too long, or they will melt, and burn. They will start to discolor a little, and thats okay, I normally heat them until they start to discolor, then put the trem back in, then repeat as needed.
Hope this helps, and good luck!