There is still to develop a toaster that roasts evenly, toast the first slice as much as the next, roasts the bottom side as much as the top and doesn’t burn the edges.
Let’s start with the even roasting, shouldn’t be too hard. Then take away the need to adjust the roast level between the slices. Continue with not burning the top side while the bottom just ok. Finally find out how to avoid burnt edges.
Also let’s find out a way to check the bread without having to raise the slice and reset the timer/temp feeler.
Here is a solution with see through sides.