I went to a club launch today (CMASS launch in Acton), and it was a real CATO-fest today. Not sure what's up with that ... really moderate weather conditions. Personally, I had two A10-3T motors CATO - one model destroyed (Semroc Gyroc - RIP), the other model survived. The first CATO blew out both ends of the motor and a pretty spectacular fireball into the air (that's the one that destroyed the Gyroc), the second CATO blew out the nozzle and made everyone go "oooh!". I filed MESS reports on both, and have contacted Estes as well. Batch# B180619 If you have any A10-3T motors from this batch, you may consider not flying them in anything you care about going "BOOM" on the pad!