So our first set of homemade racks are 90% complete. Now all I have to do is wire up the flexwatt, but I had a quick question. I tried searching the forum, but I was a bit confused on what I should do it since we are doing back heat. Do I put aluminum tape/flexwatt/aluminum tape? I heard that this will keep the heat more even.

But if we do it that way, where would we place the probe for the most accurate temp for them? I would assume on the bottom of one of the tubs that is not currently occupied?

Any help is appreciated! thanks!