It is always a good idea to file a MESS report for CATOs at
motorcato.org/ This is helpful to both fliers and the manufacturer. I also reported the CATO to Estes. They are sending me a replacement pack of engines in addition to a replacement BT80 that was damaged. When reaching out to Estes I sent them:
A photo of the motor so that they can see the blowout.
A photo of the motor from the side with the date code.
A photo of the damage to the rocket.
A photo of the top of the other motor from the pack, after soaking it in water overnight.
A pdf copy of the MESS report I filled.