Quoted from beatmaster:the fact that it's not the same angle doesn't help to prove anything.
I was also saddened by this fact; it really doesn't help us at all if the camera is in a different spot/angle. BOS pretty much summed up my feelings on wanting sound dampening over everything else.
Oh well...
Since my machines all have a shaker and a FF kit installed, I have resorted to using (bicycle) DSP 1.8 handlebar tape along the back channel and on some tiny portions of the side channels, to keep the glass from rattling during the more dramatic sequences. It works like a charm and can be removed at any time. The sound clarity is greatly improved (without the added rattle) and the bass just feels more solid. Thus, making my pinball time more enjoyable/immersive.