I recently built my own rack based off Peter Williams' 11, 28 qt tub tower... I went with 10 tubs using the top as a shelf. Also did the 17" Flexwatt back heat. Now, I am torn between 2 thermostats, Im looking at the Helix DBS1000 with the grounded cord, and the Herpstat 1 proportional thermostat with the grounded cord also. I've tried a few searches but seem to find a lot on the herpstat 2 and not the herpstat 1... Just wondering what everyones thoughts are on these 2 thermostats.