Next week I will pour the hearth slab of my Alan Scott oven, and I am trying to decide whether or not to install a thermocouple in a hearth brick. What I am having trouble with is envisioning how this is done with a flexible wire and a long run through the concrete and bricks. It would seem to me that it would be like trying to push a chain up a hill. Even if I insert a metal tube before I pour the hearth slab so I don’t have to drill a hole, how do I get a flexible wire to thread through about 8 inches of tubing through the concrete and brick? And what heppens if/when in the future the thermocouple needs to be replaced? Any insight appreciated.