An "infinite switch" is what is behind the knob on an electric switch and controls the power to the coil and so controls the heat.
The fan is currently controlled by the handle along with the heat. AND, since eventually I'm sure I would want to Milowidget the thing, now is as good a time as any to split those two.
And, although I do intend to practice more with this oven without modification, what I notice so far is that the minute the heat gets turned "off", the temperature drops. It doesn't hold steady for any time at all, and that doesn't seem like a good thing for the roast process.
Susan