oh, and correct me if i am wrong but whether you put the probe inside the enclosure or directly on the heat tape really shouldnt matter. the tape/heat source will have to emitt the same amount of heat to get the proper temps inside the enclosure. only the "set temp" will be different. it will have to be set higher if the probe is directly on the tape and set lower if inside the enclosure. but either way the heat will be the same depending on your animals specific requirements.