1: it may not be the 'best' way to do it, depending on the definition of best, but if you don't have to worry about knowing the actually temperature, it's going to be the cheapest.
We the user do not need to know the actual temperature, we just need it to remain there once we like it.
2: I'm puzzled by the comment about resistance changing as the juice level changes. I have no idea where that is coming from.
3: Yes, simpler to implement is what I'm focusing on.
Your statement about kanthal increasing resistance by 0.01 up to 972 degreeF is incomplete.
Perhaps you are referring to a 1 ohm length of kanthal?
I've been looking for kanthal temperature coefficient of resistance, but so far haven't found it.
Temperature control is still new. All I'm saying is when cars were new, a rolls Royce would have been nice, but people bought their fords, and voltswagens
Temp. coefficient Kanthal A1
C250 - F480 ------ 1,01
C500 - F930 ------1,03
C800 - F1470 ----1,04
C1000- F1830 ---1,04
Kanthal Datenblatt
I guess, they have a problem with columns in this document.
Interesting, on page 2 is a K70 called wire which is a Ni70Fe30 pure wire.