A simple 3 pin plug took two men to fix? Ewww, I'm not sure they'd ever see any of my machines again. All it takes is a simple wiring diagram and some common sense to fix that. Even I can do it ...
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I just looked at our T&S 7?? and it has an electronic controller. It requires a screw driver to pry the two halves apart at the wide end. How it's connected inside I don't know. Probably two screws like the rest of them.
Joe