I just bought my first professional rack and it came in the mail yesterday. I read through the information that they sent with it and it stated that a thermostat can support 2-3 racks on it. I have always wondered about this. I have 2 home made racks for my Ball pythons that I would like to put on the same thermostat, they both have flexwatt on them, one has 3" and the other 4" flexwatt I think. But was afraid to since the probe could only be on one of the racks. Will it heat both racks the same even with the probe just touching one rack? How does this work? Thanks.