Quote Originally Posted by MUSTANGGTANDGSXR View Post
where is your probe located? under the paper towel or on top of the substrate or on top of the paper towel under the substrate?
I tore a small hole in the paper towel directly in the center of the UTH and ran the probe down the back glass, under the towel, and through the hole and now it lays among the (scattered) aspen ontop of the paper towel. This way I am getting the temp that my girl is in direct contact with and I can make adjustments from there!

There was a thread on substrate here that the guy showed a picture(computer drawing). I tried looking for it for you but I had no luck

Hope I helped!