Oh, sorry, I was joking initially and misinterpreted your remark about it being too hot. You meant that the required temps are too hot for the circulator, which

Oh, sorry, I was joking initially and misinterpreted your remark about it being too hot. You meant that the required temps are too hot for the circulator, which is obvious in hindsight. Thanks for setting me straight. :) I'd still argue that a sous vide type circulator with a slight modification, a liquid with a higher boiling point, and a container for the board that doesn't involve vacuum sealing, would be better than the raw, unreliable oven in the OP. I bet it would end up costing about as much as a better solution, though.