I got my Herpstat 2 Redline yesterday. I got to say Im surprised its so small. I wasnt able to test the output, but i verified that it powers on and reads temps ok. I tested every part I could without having something to plug into it. So I've been thinking about the rack, and I was wondering if I should put the 90 deg F tubs on the top of the rack because heat rises and the 90 deg temp will mess with the 85 deg temps I have set. If I am incorrect in this assumption please correct me.