**********UPDATE******* see post 12 As stated I need a little help figure out something I would like to give a shot. I play a lot of experimental music including weird tunings. I don't like playing 5 stringers but I need additional low notes. Now keep in mind because of genre I must have an open D and B for "chugs". My idea is to take an extra 4string and tune it to ADAD. To use when the guitar is in dadgbe. However I would also like to be able to use the same bass for when the guitar is in drop B (B F# B E G# C#). On paper it would make more sense to stick with the tune pattern on bass and go to F# B F# B. However I don't think I would be able to find a string able to hold a low F# let alone sound good, so I was thinking I could go to BF#BE. The confusion is that when I'm going from ADAD To drop B (BF#BE) I'd actually be lowering 2 string and raising two strings. Is there a set capable of this or will I need to have different basses? Additionally please keep the negativity out of this. I don't care if you think my tunings are stupid and or pointless this is music nothing is wrong or right. I've been playing long enough to know its something worth trying(for me and my music) Thanks in advance for your input.