Pretty sure I didn't reject anyone's suggestions or comments. Just trying out things. No need to get jiggy.
The experiment has lasted a week now, and I am learning, and I am reading your comments, and I am considering all the options. I would never but my animal at risk. I work at home, I check the temps on that cage like 20 times a day. Don't assume I'm an idiot please.
On a side note. If I switch to double CHE's (1 for ambient and 1 for hotspot), where should I place the probes for these ?