Hmm...**grumbles** I wish I had thought about all of that before I decided to add the smaller tubs in there as well. I'm not good with soldering so soldering 2 4inches together is out. Although I could perhaps run 2 strips of 3 or 4 inch next to each other under the larger tubs, and just 1 next to the smaller tubs...

I wonder if that would work better, or the 11 inch with the tubs not on top of the entire piece of flexwatt, just sitting on 1/3 or 1/2 of the flexwatt so it gets some of the heat and the rest of the heat going off the back shouldn't affect them.