Here is how I have mine set up right now.
http://i201.photobucket.com/albums/a...0/P1020440.jpg
http://i201.photobucket.com/albums/a...0/P1020441.jpg
I monitor the flexwatt in between the tubs.
http://i201.photobucket.com/albums/a...0/P1020444.jpg
I taped the thermocouple to the side closest to the thermostat. Just seemed like the convenient thing to do.
http://i201.photobucket.com/albums/a...0/P1020442.jpg
http://i201.photobucket.com/albums/a...0/P1020445.jpg
My russian tortoise chills on the top of the rack. (Sorry for the tortoise turds in the pic.)
Again, Mike, thanks for the idea. very simple, light, cheap, and efficient.
Matt