I just recently made the switch from 45-100 (super slinky's) to 50-105 EXL160's. The change was because I just wanted to try something different and I actually like these better than my normal strings. Do I have to do anything different to the bass nut though? They seem to fit fine in the nut fine but I just don't know what the maximum gauge is before you would have to modify the nut. The bass is a Fender P.