The largest string my fifth string nut slot has been able to handle (and the largest I've ever put on) is a .135. I have one question about going up to this high-tension (A standard) set on my Schecter: 1. If I need to get a new nut, how do I go about doing this? 2. If I can simply file my nut slots, how do I go about doing this? Note that I've never altered my nut in any way.