Teotwaki, yes, that basket idea sounds like a great approach!
Magentawave:
I did not contradict that. The COOLING "tubes", or whatever, do indeed go around the perimeter of the top of the fridge...it is a 2-3" wide/thick/tall band beginning about an inch below the top of the fridge and going more or less all around the perimeter (this is the best I can guess from seeing how the frost sets up when compressor is running).
It's the thermostat SENSOR that is at the bottom, located approximately as I described.
So: Cooling at the top (and cold air falls to the bottom); sensing at the bottom.
Yes, I relize its entirely aluminum which helps keep uniform temperature throughout. In my previous post, which someone quoted (for you, I believe), I identified this as a hurdle for making a separate freezer compartment. If you want to hack away at this, go for it! In my final throes of desperation, I actually tried a little bit of cutting it and...well I wish I didn't.
The "foam on the floor" method is something that I did not try (I tried just about everything else to no avail); but I heave heard about others using it to some success with other fridges.
Anyways...just play around and see what you see. Foam is cheap!