I had a G80 cato on Saturday in my PML Quasar. The casing burned through just above the nozzle, and caused the rocket to go unstable about 100 feet up. It burned a hole right through the side of my Slimline retainer, but the bottom half of the rocket is ok. (Another reason to use a retainer, I know someone that had the whole bottom half of the rocket destroyed by the same type of cato.)
Guess I better report it to Aerotech. Sounds like they have a problem with some of these new SU motors. I'm sticking to G64's from now on.