Brandon, you have to wonder what caused the lower plate and grates of Caroline's 264 to burn out like that. I've examined my 288 (circa 1987) AirTight's firebox bottom several times and have noticed practically no burn wear. I average 7 cords of wood a year and the only firebox burn out I had was the back plate and the collar assembly that once surrounded the cat combustor. I replaced all that as shown in previous pic on this thread.
Also, the glass plates in the doors are held in place with rather thin steel retainers that eventually burned out. Once again, I fabricated new ones in my shop using 1/2" angle iron and they are once again secure. Even those originals lasted 22 years.
The way these Federal stoves are designed, the steel internal parts take the brunt of the heat and wear. The cast iron that surrounds the steel parts will likely last forever.
Also, the glass plates in the doors are held in place with rather thin steel retainers that eventually burned out. Once again, I fabricated new ones in my shop using 1/2" angle iron and they are once again secure. Even those originals lasted 22 years.
The way these Federal stoves are designed, the steel internal parts take the brunt of the heat and wear. The cast iron that surrounds the steel parts will likely last forever.