I've had a few crack as well. One was in the throat and the other was on the bridge. They were both within a year, so I had them replaced.
And in my experience, the bumperguards are quite difficult to replace once their a bit worn, because you have to take out the orange inserts down the side as well. But I have heard there's a special tool that makes it easier.
EXO3 Tour 16X18 -- Beast 16 at 59/57
K93 -- OGSM/Beast at 52/50