At the moment i've got the probe and the digital thermometer probe wedged between the bottom of the rub and the heat mat so that it keeps the mat at the right temperature. But thats temporary until i put her in her new one tomorrow as im waiting for a drill so i can drill a few holes for her new one. Then im planning to drill a hole on the side of the rub, down the bottom on the warm side right next to her hide and then i'll put the probe in the RUB just above where the heat mat is then cover it with some kitchen roll paper along with the temperature probe as i dont trust this thermostat, so that i know the temperature coming through the rub is correct and maybe the temperature wont drop and raise so quickly.