I've been cutting 1.5" Polyurethane foam recently with great results. The only disappointment I have is that the smoke lingers in the machine around the head longer than I'd like to see it be there. I also know my "came free with the machine" compressor is weak and I need a bigger, drier air supply.
So - for a 1200x900mm table size, what is the right amount of exhaust CFM, compressed air pressure and compressed air CFM? I typically subscribe to the "more is better" on this kind of deal, but thought I'd see if somebody's got a setup they are in love with already.