Where to put damping sheets?

Anywhere you see bare metal, on the transport parts that don't move and on top of the transformer. I prefer Dynamat Extreme.

Over dampening the inside of a piece of gear can cause a adverse affect??? Come on now, that makes no sense at all. High end manufacturers go to great lengths to dampen their gear, if it didn't help then all gear would be built like a $100.00 cdp.