[harryposner]

I don't think he's right that you could implement a bagel mode on that toaster by just running the center heating element. Both heating elements are necessary for the toaster to function (which he mentions!). You need to run the center element to drive the bread lifter, but you also need to run the outer element to heat the side of the bread facing the bimetallic strip. You can't put the bimetallic strip on the center side of the bread, since it needs direct exposure to the heat radiating off the bread, and the coiled center heating element would get in the way.

[tuukkah]

Additionally, there must not be a hole in the center of the bagel as that would cause the heat from one side to radiate directly to the bimetal on the other side.