UltraSonic HAL-O - stop tube rattles?

[Codmate]

Hi all - I found a link to this site on www.eurotubes.com
http://herbiesaudiolab.home.att.net/

I run a tube combo and suffer from the odd rattle, so I'm in the market for something like this.
Does anybody have experience with these anti-rattle products?

[Tadpui]

Interesting for sure. I play an 80-watt tube combo and it just wants to shake itself to pieces. I get lots of rattles and such, some due to the chassis, some due to the fact that my room is in no way tuned. I wonder if any is caused by microphonic vibrations.

Also I wonder if these would interfere with heat dissipation. Are they just for preamp tubes? If so I guess heat wouldn't be too much of a problem. I guess that power tubes don't contribute as much towards this problem do they?

[timthetortoise]

It looks like there are rings for power tubes too if you scroll down the page a little bit. I don't see how these would interfere with heat dissipation since it's not covering the whole thing like a spring absorber would (those things get HOTTTTT).