I realize this is an old post, but this is something I've been thinking of trying lately - building a "half 12 string" guitar, with octave low and middle and paired high, similar to conventional 12 string. Fretting would be like…"
"Mel, I've used these strings tuned DGB, but CB Gitty sells as DF#A. Maybe downtune the F# to F. unsure if the gauges give the string tension you're looking for. There's nickel wound for electric and bronze for acoustic Electric…"