OK everything has been working great the last three months with temps and my probe being about an inch behind the flexwatt. I was cleaning my tubs the other day and smelled something burning, what had happened was the flexwatt temp was around 130 (Helix was set at 96) and had gotten so hot it started melting a hole in the Iris tub (thank god no snakes were harmed!). The rack is a RB so the tubs arent sitting on the flexwatt but since then I placed the probe back directly on the flexwatt and set to 98. Temps are back down to mid to upper 80s on warm side and 80 on cool side. Room temps get no lower than 74 at night and no warmer than 80 during the day.