I made one for my little chief using a temp control dial box from an electric frying pan. works great. Just took it apart and wired in a plug that I can plug my smoker into. and I drilled a hole in the smoker for the probe to go in. I found the temp control at a thift store for like a buck. I have made two of them now and they both work great. Been using the one for 6 months or so. Still works great. Just my two cents. As for it beening safe or not, thats why I have it plugged into a surge protector. Well just wanted to give my idea out to you. Later