Hi, I have a kind of strange set up playing a five stringed bass tuned in fifths(cgdae). I just got a specialy made high e string for this bass, a original flat chromesteel which I like very much. Now I'm looking into what to pair it with. I've ordered a set of Red Mitchell spirocore but I guess I won't be to happy with the high a, so I'm looking into different options. I'm a jazz/crossover guy who plays a lot with the bow so something with some sustain and that bows good. And preferably not to thin. I guess the obvious choice would be another OFC but who knows... I've also heard some good things about permanent and flexocore deluxe. Would they fit between some spiros and OFC? I'm currently playing on gutstrings but my bass wants something with some more tension. And I don't like synthetic strings.. Any ideas?