I didn't really know where to post this, but the Strings forum seems like a good place... For some reason I suddenly have the urge to expreiment with tuning one of my bass guitars in fifths. Has anyone else attempted this? After some consideration, I've settled on Rotosound Jazz Bass flatwound strings, because I like the way these strings sound on my fretless basses, and they seem to be available in the gauges I think I need. If I find other brands of strings that I can get in multiple tensions, I may try them, as well (like D'Addario Chromes, of which I could assemble a similar CGDA set easily, but not an FCGD set). Plus, Rotosound and TI are the only two companies I know of that make flatwound high C strings, but TI only offers one tension grade, so that limits me to the Roto's as long as I'm sticking with flats. I'm going to try this two different ways: 1. CGDA (octave below cello) 2. FCGD (fifth below cello) To do this, I bought three sets of strings: 1. RS776LD (35,45,65,85,105,130) 2. SM77 (40,60,80,100) 3. RS77LE (50,75,95,110) For the CGDA tuning, I'm going to use the following gauges: C = 130 (regular tension B, tuned up 2 semitones) G = 100 (light E, tuned up 3 semitones) D = 75 (heavy D, concert pitch) A = 45 (regular G, up 2 semitones) For the FCGD, I'm using: F = 105 (regular E, up 2 semitones) C = 80 (light A, up 3 semitones) G = 50 (heavy G, concert pitch) D = 35 (regular C, up 2 semitones) That leaves me with the following gauges unused: 40,60,65,85,95,110. I can probably use some of these elsewhere in my instrument stable. Any suggestions/comments/words of encouragement?