I've got a question for you all (that would be y'all if you are here in my neck of the woods). One of my Beyma Liberty speakers took a hit from a mic a few years ago and got a nice dent in it. It started really buzzing at my last gig, and not in a good way. I noticed it now has a pretty good crack it it. How tough is it to replace a dust cap? Is it possible to do a temporary fix with some rubber cement on the crack?