Replacing Masterbilt tuners

Picked up an Epiphone Masterbilt AJ500M which I'm pretty impressed with. The crappy tuners, not so much. Any suggestions on an upgrade that will fit without (or with little) modification? I was looking at some Rotomatics but they only have one mounting screw where the Epi's stock Grovers use two. Anybody else changed their's out?

Really? I like the tuners on my Masterbilts a lot.

I am of the school that if ain't broke...
If you're having tuning issues, 99 percent of the time, they can be traced to the nut. Either poorly cut or needs some graphite -- pencil lead -- in the slots.

I've checked and lubed the nut, and the saddle looks OK. Maybe its just the 18:1 ratio that I'm not used to, but its difficult to get it at proper pitch, its seems like I have to turn them a long way just to make small adjustments, and they don't seem to be very accurate. The strings are new and I've tightened all the screws. Seems like the G string tuner is the worst, it may be defective.