This is the culmination of years of furnace design. It addresses all the major flaws of previous generations: It is pre-fired (meaning it won't crack much with high temps), It's made of an alloy free of any small rocks (that cause cracks) It is also made of Smaller bricks, ( less cracking!).
The other factor is it's great size which will allow me to melt anything.
Hif Majefty Famuel Mafy
A lovely brick from the Firefox
The gigantic and moldy fireplate