I record high gain guitars usually at a pretty good volume and I when I do this I want the room to be involved as little as possible. (The cab is so loud that one time it caused my external hard drive to vibrate so much that it could no longer record and I had to isolate it to continue, just to give you an idea) I use a boom mic and I don't want the floor vibrations interfering with the mic position even on a micro level. I thought about a shock mount for my 57, but that may actually FACILITATE mic movement rather than stop it. I could probably devise some way to isolate the boom legs from the ground to better effect. What do you think? And what should I use?