better question Scott, is why would the [bolted] pads moving be an "issue"? if they did happen to turn they would still be "isolating" metal from metal, they can't get lost
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics