Hi Retrofan,
I'm a great believer in removing the shielding from my A600's and A1200's, not only for cooling but also to allow you to examine closely the motherboard for potential trubs.
I also raise and support my A600's and A1200's at the back end, under the keyboard to encourage more of the passive cooling.
A standard "Door Stop" works a treat
If I install something which may increase the heat eg: Subway, Indivision etc I Duct Tape the inside of most of the top grill and install a fan in the gap to allow the air to be forced in to the computer.
You can even install a small piece of filter material (like that used in Cooker Hoods) above the fan to stop dust etc being blown into the computer.
Regards, Michael
aka rockape
