Have an oven that is barely within 50 degrees of what it says? With a useless computer or keypad that has failed?  Limited to 550 F? Hamish helped me clean the guts out of a Maytag re-worked Jenn Air, designed so poorly they put the computer and keypad where they would get hot in minutes and fail in months (above the oven door).  Parts aren’t cheap and kept failing so I dreamt replacing the keypad with toggles and the CPU with a PID. Voila, Second-Jenn Air capable of pizza temps of 700 F and individual controls for each element, including the convection.  A 12 volt computer fan keeps PID cool during hot runs. Hamish is a genius, and, notice the soldering iron temp is the same as the oven, accurate to a tenth of a degree, a dream come true…