I'm sorry I didn't address that part. I electric taped the probe to the tape itself, off to the side where the tubs bevel inward. I can now set the thermostat to 94 and get a hotspot of 88-90.+ I don't have a herpstat, mine is an on/off for now so it will drop a few degrees under and push for a little extra as it goes.. But nothing outside reason. I do keep a very close eye on its placement, but it's a fair trade compared to the issues I had before.