Damaged tubes

[FinnAmerican]

Since I've started using cakes, I make sure to tear away the top paper and check each tube for damage before setting it off. I would imagine that a faulty tube could do some harm.
Has anyone here ever had a misfired cake due to a dented tube..?
I've found three damaged cakes out of twenty. I didn't want to risk shooting them by trying to straighten them. The same would go for damaged Roman Candles

[jsifue2]

I have never had any cake misfire due to bent tubes, atleast to my knowledge. I have had cakes with minor bends in the tubes, I'll usually straighten them out as best as possible and still fire them without an issue.

[Arclight]

Some consumer fireworks explode if they get crimped or the pressed-in powder is pulverized. Not that I know anything about that.