Since you have the room, why not make a layer of plexi glass and mount your keyboard on that? That way you have nothing touching the Motherboard.. You can mount a nifty fan somehow to vent the heat out of enclosed area.
Yout idea makes me want to try something butI can hear my wife thinking..."you do have a laptop right?"
Yout idea makes me want to try something butI can hear my wife thinking..."you do have a laptop right?"