Here are a couple of pics from our 2013 robot. The gears were on the robot through 3 competitions (2 regionals and Championships)
I'm pretty sure the cam for the shooter was put on at our second regional to replace one that didn't work well at our first regional.
In both cases, no breakage because they were not under high stress.
https://plus.google.com/photos/10807...1/albums/posts