I have sorta come up with a different design, and my buddy (amateur carpenter) said he would be willing to help.
I am going to use 11 inch Flexwatt for my 41 quart tubs, but I don't need it for any of the other ones. I wanted to use 4 inch Flexwatt for the smaller tubs. I know the different sizes of Flexwatt run different wattages, so would I be able to use the same thermostat for both heat tapes?