Like the title says I'm getting close to talks with my luthier to start my second 7 string. One thing I'm wondering is: these two guitars are going to function for the same bands, now naturally speaking I'd think a second guitar should be a little different, just to have more options come recording time. But how different? Number 1 has a D-sonic bridge and an air northon in the neck. I love the sounds I'm getting. Since I'm playing orchestral black mostly nowadays, I've been thinking about those new seymour duncans they've been putting out (the black winter, nasgul,...) but maybe the difference would be too big? (say switching halfway a set) How do you guys go about this?