Yes, you can fix that piece of sheet glass that broke the wrong way.
Critical to success is lining up and pushing the broken pieces together so that the break is as invisible as possible before firing,
Fahrenheit Schedule:
0350 -> 1100 0:00
9999 -> 1400 0:03
9999 -> 0900 1:00
0100 -> 0725 0:00
OFF
Celcius Schedule:
0195 -> 0595 0:00
9999 -> 0760 0:03
9999 -> 0480 1:00
0100 -> 0385 0:00
OFF
For Oceanside/System 96 simply change the 900°F to 950°F (480°C to 510°C).