Yep, so I've lived up to my signature. My nut on my Epi SG just broke along it's top edge, taking with it half of the slot that holds the bass E string. Naturally I'm very disappointed. :( I was just playing it a few days ago and it was fine. I don't even know how it happened, yet I suspect the heavy gauge strings (bass E = 52) I recently tried out are the culprit.
So my questions are:
1. Is this a replacement that could be done by me, a novice in this aspect, and still be worth it in savings of time and money?
2. If so, should I buy a pre-slotted nut, or a blank and file my own?

I've replaced tuners that needed bigger holes successfully before, so I'm not afraid to tackle a project, but I don't want to permanently damage it either. So...
3. Suggestions? Previous expierence?