La bella makes some custome baritone sets. I'd do with 15-80 set(6 string) + something thinner bought separately, but IMHO for fine tuning to F# you need longer scale. I have custom 27" scale 7 string guitar and I tune it only to A using .70 gauge. 27" scale on RG2228 is the stupidest thing that Ibanez have ever made. Just look at Meshuggah guitars. They use 30" scale and that's reasonable.