Thanks. True, but your speculation is better than Phillips' silence.Nobody here can (or should) confirm that the particles you see is the sound abatement foam.
However, on the RemStar, the filters were placed at the air intake, before the pump. The particles you found on the filter could *NOT* have come from any of the device internals.
Do you know where the air intake was? I'm trying to find it.
EDIT: Nevermind I understand now - it's where the filter is.