I've made a pretty wholesale switch to 4 string basses since the days when I played 5-ers, but every once in a while an opportunity comes up calling for one. So I buy a used 5 and try to utilize them... but just can't get comfortable with them anymore. I like a slim, slender neck, and am dead set on staying with a 1.5" nut. Or smaller.
I stumbled across this thread while researching BEAD, which I originally thought might be my solution... And though I haven't read all 7 pages yet, over the past week I've been in and out, and read most of the old thread, and just decided this was the thing to try, instead. I had an order of DR Hi-Beams already en route, and they arrived today, so i strung up my P/J assembly project with the .120, .80, .60, and .40, CGDA.
Initial thoughts--the chording ability is FUN. I play some mandolin and bouzouki, so the 2 and 3 finger chords are already intuitive. I don't usually play many chords on bass (little call for it in my opportunities), but that's about to change. The tonality of the chords in this tuning (or
on these strings/at this tension?) is entirely different, and VERY pleasant.
Speaking of tension: on this set on my bass (34" scale) the A is pretty tight, though from my reading not significantly higher-tension than the D string already is. It certainly sings quite well. By comparison, the C and G
do feel a little loose, but not distractingly so. I don't play with a pick, and am not a fan of fat strings, so I'm not planning to move up in gauge just yet... I'll see if I really notice the difference between the lower tensions and higher tensions. The strings really sound pretty good, though.
I'm playing bass in the pit for RENT the musical in July, and though I don't have the music yet, I'd worked up the song Santa Fe as an audition piece. Lot's of 1-5-9-11 stretches all OVER the place in this song (it's in B, but the bottom triad of all the arpeggios always sounds kind of modal/B5-ish). It's really a nightmare, though totally possible with the aid of the open D string. Some guys actually tap on it, because that's the trick if you have that skill (I don't). HOWEVER--in 5ths tuning? The entire bass line makes total sense. It's not a reach ANYWHERE, and, in fact, the positions are quite boring comparatively!
I'm convinced that the playwright wrote the original line for cello. Convinced. Also, I'm kind of thrilled.

I'm going to spend a month getting used to it--I don't really play patterns; coming from piano/trombone, I think "notes" almost all the time, so I plan to fall heavily in love with this tuning.
Ooops, this new TB forum software apparently does not allow one to upload xls files so I cannot attach my latest version. If you look elsewhere in this thread you can see an older version of my tension calculator spreadsheet, I guess that is the best I can do for now.
Ken - can you provide copies of the directions you originally posted with your spreadsheet? I was able to download the document, but the old "how to use" links no longer work. Thanks in advance!
Jeff