Well I've decided to build my own rack. (more like getting a friend to help/do it for me )

It will hold five 32qt tubs with an extra shelf on the bottom for holding things like feeding tongs, extra substrate, ect. It will have locking pins of some kind and be heated by flexwatt.

I was wondering how the flexwatt works. Do you stick it to the actual tub or the shelf? If to the shelf, should there be a little recessed area to stick it to, so there is air between it and the bottom of the tub? How is this recessed area acheived?

How much flexwatt should I order for five 32qt tubs? What width? Can it all run on one thermostat? Can the flexwatt be assembled for me pre-shipping, or do I have to do it at home? If it has to do it at home, how do you do it?

When putting thermometers in the tubs, should there be one only on the warm side (thermometer up near front of tub, probe on warm side?) or should there be one on each side?