I have a Brinkmann TMLE offset smoker. One of the problems with the design is the temperature differentials, so I drilled a couple of holes down at the bottom of the cooking chamber door, and I installed grate-level dial thermometers. Since then, I have gone digital, and there is a difference between the temp in the middle of the grill grate vs. the edge, so the dial thermos are pretty useless. I'm planning to remove them, and plug the holes. What I'm wondering is if anyone has some ideas on a silicon plug or some other type of soft material "gasket" so I can pass the wires for the thermos out of the lid and seal the hole. Suggestions?